(DEFENCE SECURITY ASIA) — USS Spruance returned to San Diego on November 13 after 357 days deployed, one day after USS Michael Murphy reached Pearl Harbor following 346 days away, closing two exceptionally long U.S. Navy destroyer deployments driven by the war against Iran.

Both Arleigh Burke-class guided-missile destroyers began their cruises with the USS Abraham Lincoln Carrier Strike Group in the Pacific and remained in the Middle East after the carrier left, extending American surface combat power past the withdrawal of its flagship.

The November homecomings expose a force-planning dilemma for Washington, because destroyers sustaining combat operations and protecting shipping near the Strait of Hormuz are also in demand for carrier escorts and allied commitments across the Indo-Pacific.

Spruance’s cruise has been described as the longest U.S. destroyer deployment since World War II, a historically significant claim that remains provisional because the Naval History and Heritage Command does not maintain a definitive ranking of destroyer deployments.

The two cruises exceeded the 326-day post-Vietnam carrier deployment benchmark set by USS Gerald R. Ford, a comparison across ship types that shows how far the Iran operation extended the commitments of individual Pacific Fleet escorts.

The redirection from Indo-Pacific presence operations into the U.S.-Israeli campaign that began on February 28 turned a carrier deployment into a prolonged test of how long the surface force could sustain strike, air defence and maritime security commitments.

Under Operation Epic Fury, the two ships moved between land-attack missions and defensive duties, and their subsequent participation in the blockade of Iranian ports gave Washington a reason to keep surface combatants in theatre independently of the carrier’s schedule.

Cmdr. Leigh R. Tate, the commanding officer of Spruance, called leading the crew the “honor of a lifetime,” a homecoming assessment that came after hundreds of sailors completed a deployment that had grown well beyond its planned seven months.

The destroyers’ Presidential Unit Citations and Combat Action Ribbons marked the intensity of the deployment, while their homecomings established when the Navy could begin reconciling wartime operating demands with deferred upkeep and recovery time for crews.

Each destroyer conducted 43 replenishments at sea, a measure of the support needed to keep two ships on station while they alternated among combat, escort and blockade duties across a deployment of nearly a year.

For governments and shipping operators watching Hormuz, the case demonstrates how American naval presence can persist through a carrier’s departure, although the durability of that presence depends on replacement forces, resupply and crews able to sustain repeated periods of high demand.

The readiness test now moves ashore, where the Navy must oversee crew recovery and ship maintenance while preserving enough deployable surface combatants to sustain commitments in two theatres that draw on the same pool of manpower and hulls.

(READ) China’s Next Destroyer: Type 052D Successor Could Shift Naval Balance With US

How a Pacific Carrier Deployment Turned Into a Near-Year Combat Cruise

Spruance sailed from Naval Base San Diego with USS Abraham Lincoln on November 21, 2025, and Michael Murphy joined from Pearl Harbor on December 1, beginning as Pacific escorts whose assignment would shift as demand rose in the Middle East.

Their movements through the U.S. 3rd, 7th and 5th Fleet operating areas show how a carrier group can shift combat power between regional commands during one deployment, with consequences for each command’s ability to plan its future rotations.

The shift to the Middle East put the destroyers in position to take part in the opening phase of Operation Epic Fury, demonstrating how ships committed to Pacific presence can quickly become part of a separate theatre’s strike and defence force.

The two destroyers’ place in Carrier Strike Group Three gave the Navy a pool of ships that could be reassigned as requirements evolved, allowing the carrier’s departure and the surface force’s continued deployment to proceed on different schedules.

The return of USS Frank E. Petersen Jr. to Hawaii in late September after roughly 301 days showed that the group’s drawdown was staggered, with individual escorts coming home weeks apart as requirements and rotation decisions diverged within the formation.

By the time Abraham Lincoln reached San Diego on October 8, the Navy had already put the destroyers on a separate schedule, keeping both destroyers deployed for more than a month beyond the flagship’s homecoming.

That separation preserved a surface presence after the carrier left the Middle East, but its effect reflected the destroyers’ mission set, since escort coordination, maritime patrol and land attack cover only part of a carrier group’s duties.

The deployment tally for Spruance includes more than 88,000 nautical miles, while Michael Murphy covered more than 97,000 nautical miles in fewer days, underscoring that elapsed time and distance capture different aspects of the burden placed on crews and machinery.

Both ships outlasted the recent benchmark set by USS McFaul’s roughly 11-month deployment, which ended in Norfolk in October, making the cluster of extended cruises a stronger indicator of fleet pressure than any one disputed claim about historical records.

These Pacific ships gave Washington flexibility to sustain a Middle East commitment through a change in carrier posture, with the trade-off falling on fleet managers who must sequence future assignments around multiple crews and hulls returning from unusually long operations.

(READ) China Builds US Destroyer Replica in Desert, Sharpening Anti-Ship Missile Training

Operation Epic Fury Put Aegis Destroyers on Strike and Air Defence Duty

The Aegis destroyers entered combat in the opening phase of Operation Epic Fury, and both subsequently conducted repeated Tomahawk land-attack cruise missile strikes, giving the campaign a sea-based strike option that could remain in theatre after Abraham Lincoln departed.

Using destroyers for both strike and defence gave commanders flexibility as requirements changed over the campaign, while sustained demand for each mission drew on the crews, equipment and finite magazine capacity of the same ships across successive months of operations.

Spruance recorded 12 unmanned aerial vehicles and four anti-ship cruise missiles destroyed, figures from the Navy’s combat tally that describe engagements credited to the ship while leaving wider questions about Iranian launch activity and campaign-level effects open to assessment.

The mix of drones and anti-ship cruise missiles matters to fleet planning because it obliges an escort to remain ready for different airborne threats throughout a deployment, even as the same ship continues carrying out assignments unrelated to air defence.

Michael Murphy also conducted land-attack strikes and defended against hostile drones and missiles, giving the surface force additional coverage as Washington sustained combat operations in the Gulf, although the available figures provide an uneven basis for comparing the two ships.

As surface action group commander for Task Force 50, Michael Murphy coordinated defence for 14 U.S. and coalition vessels, an assignment that made its command responsibilities relevant to partner navies as well as to the safety of its own crew.

Spruance also took on surface action group command duties, illustrating the command flexibility that made both destroyers valuable beyond the carrier formation and allowed their extended tours to sustain coordination across a wider naval force during separate stages of the campaign.

The presence of multiple strike and air defence ships broadened the options available to U.S. commanders, although the deployment totals provide no measure of how often the task force could have replaced a ship while maintaining comparable coverage across all assignments.

Claims that combat operations degraded threats to shipping require a wider evidentiary basis than the ships’ engagement counts, since intercepted weapons document individual encounters while the resilience of Iran’s capabilities and the security of subsequent traffic are separate questions.

For allied planners, the campaign illustrates the value of keeping a multifunction escort available through changes in force posture, while also revealing the cost of concentrating strike, defensive coordination and maritime security responsibilities on ships already supporting a prolonged combat operation.

Strait of Hormuz Escorts Put Merchant Shipping at the Centre of U.S. Force Posture

Michael Murphy completed 12 contested transits of the Strait of Hormuz and escorted four merchant tankers to safety, a defined contribution to commercial passage through a waterway where the conflict affected commercial operators far beyond the Gulf.

The difference between destroyer transits and completed tanker escorts matters because the former measures naval activity and the latter records specific commercial movements, leaving the scale and consistency of traffic across the strait outside the evidence provided by either figure.

Reported air, surface and mine threats shaped the operating environment during those transits, making an escort’s ability to coordinate with other ships part of the wider effort to sustain a naval presence and support merchant passage.

The blockade of Iranian ports and the protection of merchant tankers were distinct assignments carried out in the same broader campaign, requiring the surface force to sustain both maritime enforcement and commercial escort duties as the carrier and its air wing withdrew.

Spruance helped enforce the blockade and disabled the cargo vessel M/V Touska, an episode that illustrates how a U.S. decision to enforce restrictions at sea could turn an extended deployment into a direct confrontation involving an individual merchant ship.

The Navy characterised the blockade as its first operation of that kind in about six decades, a historical comparison that underlines the unusual breadth of the assignment while leaving the operation’s broader economic and military effects to be assessed separately.

Washington presented the ships’ contribution in terms of maritime security and freedom of navigation, while the record of individual escorts and blockade actions provides a narrower basis for assessing what the destroyers accomplished during their extended time in theatre.

The combination of escort activity and blockade enforcement sustained a visible American military role around Hormuz after the carrier left, signalling that a change in carrier posture could coexist with continued U.S. surface operations around the strait.

For commercial operators, the return of two heavily used escorts shifts attention toward whether follow-on forces can sustain comparable coverage, with the continuity of naval commitments depending on subsequent rotations whose composition and timing are beyond the scope of the homecoming figures.

For coalition partners, the months after the carrier’s departure demonstrated the value of a surface command structure that could persist through a major rotation, while exposing how the duration of commercial escort and maritime enforcement duties could outlast an individual formation’s planned deployment.

Replenishment at Sea Kept the Destroyers Running for Nearly a Year

Spruance and Michael Murphy each completed 43 underway replenishments, a measure of how regularly the destroyers depended on a wider support network to remain deployed across the Pacific and Middle East while maintaining the ability to respond to changing tasking.

Spruance recorded transfers totalling 8.6 million gallons of fuel, a measure of replenishment activity across three fleet areas that helps explain how ships retained overseas for additional months remain dependent on a continuous logistics commitment.

Michael Murphy logged more than eight million gallons of F-76 marine fuel and two million gallons of JP-5 aviation fuel across its deployment, illustrating the distinct supply requirements associated with keeping a destroyer and its embarked aviation element operational.

The ship also completed eight in-port refuelings during combat operations, demonstrating that shore access supplemented its underway replenishments and that the footprint behind a prolonged naval deployment included ports as well as the support ships that supplied fuel at sea.

The Helicopter Maritime Strike Squadron 71 detachment on Spruance flew more than 190 sorties and logged 1,150 flight hours, extending the ship’s operational reach while adding aircraft servicing, fuel supply and aircrew endurance to the requirements of an already demanding deployment.

Michael Murphy’s HSM-71 Detachment 2 flew 330 sorties and more than 900 flight hours, a different flying schedule that shows why sortie counts and hours capture different dimensions of the workload imposed on aircraft, crews and maintainers.

The volume of fuel handled across both cruises illustrates the demands placed on the support force, since delivery commitments grow as the ships it supplies stay forward and the same combatant may require repeated replenishment over several phases of one campaign.

The reported fuel transfers measure one part of sustainment, with the availability of spare parts, the condition of equipment and the munition stocks also factors in whether a warship can sustain the same range of missions.

Longer cruises can defer demand for a replacement combatant while extending the period in which logistics ships and support personnel must service the existing force, moving part of the burden of rotation from frontline hulls to the sustainment network.

The deployments showed that the Navy could supply these two destroyers through an extended campaign, and the replenishment rate illustrates what Washington would have to sustain if demand for surface forces remained high across both the Pacific and Middle East.

Longer U.S. Navy Deployments Threaten Maintenance and Indo-Pacific Readiness

Chief of Naval Operations Adm. Daryl Caudle’s assessment that crews could expect “at least a 10-month deployment” tied the longer tours to fleet capacity, raising a longer-term question about the Navy’s ability to sustain recurring commitments.

A fleet accustomed to roughly seven-month cruises faces scheduling pressures as tours approach a year, since extra time spent forward can narrow the interval for maintenance, training and certification before ships are needed again for their next assignments.

Caudle described the maintenance outlook as a “years-long recovery,” a warning that repercussions can reach beyond returning ships when overdue work competes for yard capacity with scheduled overhaul periods already allocated to other combatants in the fleet.

The departure of Japan-based USS John Finn from its expected Western Pacific routine, with a projected deployment of 13 to 14 months, shows how a prolonged Middle East commitment can also draw on ships assigned to America’s forward posture in Asia.

That projection remains contingent on the ship’s eventual return, but it raises a planning question for U.S. allies in Asia about the availability of forward-based destroyers if a crisis there coincides with an extended requirement for surface combatants elsewhere.

Maintenance delays also affect force generation through their sequence, since a ship that returns late may need work before it can resume training and certification, and a yard schedule under pressure can extend that interruption beyond the original deployment overrun.

Crew recovery poses a separate constraint on readiness because successive extensions weigh on sailors and families, and the Navy’s ability to sustain longer rotations depends in part on retaining people with the experience needed to operate and maintain complex ships.

The return of three Abraham Lincoln escorts after roughly 300 days or more concentrates recovery demands within one strike group, turning decisions made to sustain combat operations into linked maintenance and personnel challenges across multiple Pacific Fleet units.

The geopolitical consequence reaches beyond the Gulf because assurances of American presence in the Indo-Pacific depend on ships available at the time of a crisis, and fleet totals reveal little about short-notice availability for reassignment.

Spruance and Michael Murphy gave Washington months of additional combat and escort capacity during the Iran war, and repeating those extensions will depend on how quickly the Navy restores surface forces for their next commitments.