Why the Marines Are Arming the Chokepoints Near Taiwan

The U.S. Marine Corps has spent the past year and a half quietly ringing the maritime approaches to Taiwan with a weapon built for one purpose: sinking ships before they can reach open water. The latest unit to receive it, the Okinawa-based 12th Marine Littoral Regiment, took formal delivery of its first Navy-Marine Expeditionary Ship Interdiction System (NMESIS) batteries the week of June 28, 2026, according to Naval News.

The logic behind the deployment is geography. The 12th MLR sits at Camp Hansen, within range of the “first island chain” archipelagos separating Japan, Taiwan and the Philippines — a stretch of water the Marine Corps says lets land-based launchers “threaten enemy naval forces from traversing the strategically critical” straits that any Chinese move against Taiwan would have to cross, Naval News reported.

What NMESIS actually is

NMESIS pairs a Naval Strike Missile — a Norwegian-designed, radar-evading anti-ship weapon built jointly by Kongsberg Defence Systems and RTX — with an uncrewed launch vehicle derived from the Corps’ ROGUE-Fires platform. A full battery fields 18 launchers organized into six three-launcher sections, each truck carrying two missiles that can be cued and fired without a Marine in the driver’s seat, per Naval News. The missiles themselves run roughly $2 million apiece and can hit ships more than 120 miles away, according to reporting from Yahoo News.

That combination — long range, low crew exposure, a small enough footprint to move by landing craft — is the point. Rather than keeping ships or aircraft forward-based where they are easy to target, the Corps wants to scatter truck-mounted missile batteries across small islands, where they are harder to find and harder to kill in the opening hours of a conflict.

Not a one-off deployment

Okinawa is the second major waypoint for NMESIS this year, not the first. During Exercise Balikatan, the annual U.S.-Philippine drill that ran April 21 through May 9, 2025, Marines moved NMESIS launchers into the Batanes Islands — Philippine territory roughly 120 miles from Taiwan’s southern coast, straddling the Bashi Channel that connects the South China Sea to the Pacific, the Yahoo report said. More than 14,000 troops took part, with Australian and Japanese contingents attached, making it the largest Balikatan to date.

U.S. exercise director Lt. Gen. James Glynn described the drill as testing “regional security challenges” beginning in the South China Sea, while his Philippine counterpart, Maj. Gen. Francisco Lorenzo, said the exercises “may probably help deter the conflict in Taiwan” even as officials publicly frame the posture as defensive, according to Yahoo’s account. Beijing’s foreign ministry pushed back at the time, with spokesperson Guo Jiakun warning that countries using Taiwan as a “pretext” for military expansion are among “those who play with fire” who “will burn themselves,” the same report said.

The chokepoint strategy

Both deployments target the same category of terrain: narrow straits a Chinese amphibious or naval force would need to transit to reach Taiwan from the south, or that U.S. and allied forces could use to interdict Chinese shipping in a wider blockade scenario. The Bashi Channel and the Luzon Strait are the two most cited chokepoints, sitting between Taiwan, the Philippines and the open Pacific. By placing missile batteries on the islands that flank those waters, the Marine Corps is betting it can hold any ship transiting them at risk without stationing a destroyer or carrier group nearby full time.

The Corps has said it plans to field 14 NMESIS-equipped batteries by 2030, with three earmarked for the Pacific theater specifically. The Okinawa unit and the rotational Philippine presence are the first concrete steps toward that target, rather than the finished posture.

Part of a wider defense push

The Taiwan-adjacent buildup is unfolding alongside other U.S. defense moves this week, including a Pentagon deal with Raytheon to expand missile interceptor production — a reminder that RTX, the same contractor behind the Naval Strike Missile used in NMESIS, sits at the center of multiple active U.S. procurement lines. Washington is also managing a tense diplomatic moment in Europe, where Russian strikes killed at least a dozen people in Ukraine just after the Trump administration eased sanctions allowing Russian diesel exports as part of a separate negotiation. The Pacific posture shift and the Ukraine diplomacy are unconnected in substance, but both illustrate a Pentagon and White House operating across multiple theaters simultaneously heading into the fourth quarter of 2026.

Neither the Pentagon nor the Chinese Ministry of National Defense has announced a formal response to the Okinawa delivery beyond the routine statements that accompanied the unit’s redesignation in 2023. Taiwan’s own anti-ship arsenal — built around U.S.-supplied Harpoon missiles and domestically produced Hsiung Feng missiles — remains separate from the Marine Corps’ NMESIS batteries, which answer to U.S. commanders rather than Taipei.