{"id":33114,"date":"2024-01-05T21:20:23","date_gmt":"2024-01-05T21:20:23","guid":{"rendered":"https:\/\/one.sightlinemg.com\/marinecorpstimes\/uncategorized\/2024\/01\/05\/marine-rotational-force-units-expand-corps-pacific-footprint\/"},"modified":"2026-08-08T21:02:40","modified_gmt":"2026-08-08T21:02:40","slug":"marine-rotational-force-units-expand-corps-pacific-footprint","status":"publish","type":"post","link":"https:\/\/one.sightlinemg.com\/marinecorpstimes\/news\/your-marine-corps\/2024\/01\/05\/marine-rotational-force-units-expand-corps-pacific-footprint\/","title":{"rendered":"Marine rotational force units expand Corps\u2019 Pacific footprint"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">A pair of Marine Corps rotational force units, one new and the other more than a decade old, are <a href=\"https:\/\/www.militarytimes.com\/news\/your-marine-corps\/2019\/07\/01\/congress-wants-a-review-of-the-corps-plan-to-distribute-forces-across-the-indo-pacific\/\" target=\"_blank\">expanding the footprint<\/a> of Marine units in the Pacific.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Marine Rotational Force-Darwin has deployed Marines for six-month rotations to Australia for a dozen years while Marine Rotational Force-Southeast Asia kicked off its first deployment in 2023.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Commanders for the most recent rotational force deployments spoke with media Friday about recent developments with the units.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Col. Brendan Sullivan commanded the 2,500 Marines of MRF-Darwin during its March to November deployment. <a href=\"https:\/\/www.11thmeu.marines.mil\/News\/News-Article-Display\/Article\/3526760\/partnerships-in-practice-california-marines-remain-pros-in-southeast-asia\/\" target=\"_blank\">Col. Thomas Siverts<\/a> commanded MRF-Southeast Asia, or MRF-SEA, of about 200 Marines for its second deployment, from September to December. Siverts also commanded the 11th Marine Expeditionary Unit at the time.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sullivan highlighted how the Darwin force in its past two rotations has pushed Marine units off Australia and into the nearby area of operations.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Marines embarked four MV-22B Osprey tiltrotor aircraft and a contingent of ground forces on the Australian HMAS Canberra, a first for the service.<\/p>\n\n\n\t<aside class=\"smg-interstitial-link wp-block-smg-interstitial-link\">\n\t\t<a href=\"https:\/\/one.sightlinemg.com\/marinecorpstimes\/news\/your-marine-corps\/2024\/01\/05\/how-the-osprey-grounding-affected-a-marine-unit-in-the-indo-pacific\/\" class=\"smg-interstitial-link__inner\">\n\t\t\t\t\t\t\t<div class=\"smg-interstitial-link__media\">\n\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"169\" src=\"https:\/\/one.sightlinemg.com\/wp-content\/uploads\/2026\/08\/Bougainville.jpg.jpg?w=300\" class=\"smg-interstitial-link__image wp-post-image\" alt=\"\" \/>\t\t\t\t<\/div>\n\t\t\t\t\t\t<div class=\"smg-interstitial-link__content\">\n\t\t\t\t<span class=\"smg-interstitial-link__kicker\">Related<\/span>\n\t\t\t\t<h3 class=\"smg-interstitial-link__title\">How the Osprey grounding affected a Marine unit in the Indo-Pacific<\/h3>\n\t\t\t\t\t\t\t\t\t<p class=\"smg-interstitial-link__excerpt\">Without Ospreys, the 31st Marine Expeditionary Unit can still carry out its missions, according to its commander. But it has made things harder.<\/p>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/a>\n\t<\/aside>\n\t\n\n\n<p class=\"wp-block-paragraph\">The force then sailed to the Philippines and ran two separate amphibious assaults.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">While in the Philippines, the MRF-Darwin\u2019s command element served as the coordinating unit for Marine, Army, Navy and Australian sensing data for maritime fires.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The unit also used its home base in Darwin as a hub in a lengthy kill web that could protect the region, should Australia face outside threats.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u201cEvery single day Darwin is becoming more of a hub for us, not just in Australia but through the island chain,\u201d Sullivan said.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">As part of a larger effort to operate in far-flung and austere conditions, Marines set up a bare bones air base on the York Peninsula, Queensland, Australia complete with a fires unit armed with anti-ship missiles and a sensing unit to run air defense.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u201cWe were able to project, employ and sustain the (unit) across that hub-spoke-node network for a total of about 1,400 miles,\u201d Sullivan said.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Marines also used their own and Australian aircraft, including C-130s, C-17s and Ospreys to establish an Expeditionary Advanced Base that set up an Osprey maintenance base to extend the aircrafts operations during military exercises.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u201cThese are real posture gains being made there that will be useful for us in conflict,\u201d Sullivan said.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Both rotational force units covered sometimes-overlapping areas of the Pacific, even as their counterparts on the 31st MEU conducted standard operations in the region. <a href=\"https:\/\/www.marinecorpstimes.com\/news\/your-marine-corps\/2024\/01\/05\/how-the-osprey-grounding-affected-a-marine-unit-in-the-indo-pacific\/\" target=\"_blank\">Marine Corps Times recently reported<\/a> work by the MEU during a humanitarian assistance mission to Papua New Guinea after the volcano eruption on Bougainville Island in August.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">But, Sullivan said, when MRF-Darwin worked near the 31st MEU during their deployment, the two units shared information for targeting and kill webs. On one occasion a primary fuel source for the MRF-Darwin\u2019s Ospreys was unavailable so 31st MEU Ospreys met their counterparts on an impromptu landing site to share fuel.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u201cIf you take a look at the laydown of Marine forces west of the International Date Line, especially during peak seasons, which we call summer in the northern hemisphere, you\u2019ll see a web of Marine forces across the region,\u201d Sullivan said.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"5472\" height=\"3648\" src=\"\/wp-content\/uploads\/2026\/08\/MRF-SEA-casevac.jpg.jpg\" alt=\"\" class=\"wp-image-64991\" srcset=\"https:\/\/one.sightlinemg.com\/wp-content\/uploads\/2026\/08\/MRF-SEA-casevac.jpg.jpg 5472w, https:\/\/one.sightlinemg.com\/wp-content\/uploads\/2026\/08\/MRF-SEA-casevac.jpg.jpg?resize=300,200 300w, https:\/\/one.sightlinemg.com\/wp-content\/uploads\/2026\/08\/MRF-SEA-casevac.jpg.jpg?resize=768,512 768w, https:\/\/one.sightlinemg.com\/wp-content\/uploads\/2026\/08\/MRF-SEA-casevac.jpg.jpg?resize=1024,683 1024w, https:\/\/one.sightlinemg.com\/wp-content\/uploads\/2026\/08\/MRF-SEA-casevac.jpg.jpg?resize=1536,1024 1536w, https:\/\/one.sightlinemg.com\/wp-content\/uploads\/2026\/08\/MRF-SEA-casevac.jpg.jpg?resize=2048,1365 2048w\" sizes=\"auto, (max-width: 5472px) 100vw, 5472px\" \/><figcaption class=\"wp-element-caption\">Marines with Marine Rotational Force-Southeast Asia, I Marine Expeditionary Force carry a simulated casualty at a casualty evacuation subject matter expert exchange during Keris Marine Exercise 2023 as a part of MRF-SEA at Piabung Training Area in Sukabumi, West Java, Indonesia, Nov. 30, 2023. (Cpl. Dean Gurule\/Marine Corps)<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The MRF-SEA is a bit smaller but perhaps nimbler in its early version. The 200-Marine unit jumped around the Pacific in multiple partner and allied exercises during its deployment.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The new unit is composed of a small command element with attached functions such as command and control, reconnaissance, sensing, air naval gunfire and other expert teams.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Marines with MRF-SEA conducted four exercises during their deployment, three in the Philippines and one in Indonesia.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Siverts told reporters that his unit was able to use encrypted devices on host nation wireless networks to communicate with mobile phones while blending in on the network virtually undetectable.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Much of the work that the MRF-SEA did was to fill in needs for partner forces. For example, he said, they provided an infantry platoon during training with their Singapore counterparts and a reconnaissance element for another partner.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">During the Philippine exercise known as Sama Sama in October, MRD-SEA formed a sensing node known as a Maritime Sensing Team for their host nation partners.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Marines deployed a SIMRAD radar, which is commercially available, to detect ship movement within straits and littorals. The team then confirmed the identity of any threats or targets using an RQ-20B Puma drone.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The small package of Marines and limited equipment filled gaps in radar coverage for forces operating close to shore, officials said.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Two Pacific-focused rotations cover more ground, and ocean, for the sea service.<\/p>\n","protected":false},"author":7,"featured_media":64990,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_yoast_wpseo_meta-robots-noindex":"","_yoast_wpseo_meta-robots-nofollow":"","_yoast_wpseo_canonical":"","_acf":"","_yoast_wpseo_primary_category":69,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","_smg_distribution_targets":{"2":{"categories":["your-military","news"],"primary_category":"your-military"}}},"categories":[101,6,12,25,69],"tags":[],"coauthors":[3396],"class_list":["post-33114","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-daily-news-roundup","category-ebb","category-news","category-newsletters","category-your-marine-corps"],"acf":{"subheadline":"","legacy_arc_id":"TCG6WUKWPVGWDBX2GBH7ARE5HE","arc_canonical_url":"\/news\/your-marine-corps\/2024\/01\/05\/marine-rotational-force-units-expand-corps-pacific-footprint\/","remove_feature_photo":false,"is_sponsored":false,"subtype":"","redirect_url":"","disable_inline_ads":false,"native_logo_pretext":"Presented By:"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.0 (Yoast SEO v28.1) - 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