During the Rim of the Pacific (RIMPAC) 2026 exercises, allies from 30 nations conducted extensive naval drills in Hawaiian waters, including live-fire sinking exercises (SINKEX) involving retired U.S. warships like the USS Mobile Bay and USS Peleliu. The drills demonstrated expanding anti-ship capabilities and interoperability among multinational forces, featuring aircraft like the P-8A Poseidon flying with mixed crews from partner nations. The event also included humanitarian assistance coordination and air-sea rescue training. However, the exercises have drawn criticism for potentially threatening regional stability and impacting local indigenous communities and the environment.