ABOARD THE USS THEODORE ROOSEVELT (AP) — A U.S. carrier strike group led by the USS Theodore Roosevelt has held a two-day joint exercise with its allies Japan and South Korea as U.S. President Joe Biden met for talks with leaders from Japan and the Philippines at the White House. The military and diplomatic maneuvers are meant to strengthen the partners’ solidarity in the face of what they see as China’s aggressive military actions in the region.

A number of U.S. and South Korean guided missile destroyers and a Japanese warship joined the drills in the disputed East China Sea, where worries about China’s territorial claims are rising. The Associated Press was one of several news organizations allowed a front-row look at the drills.

Rear Adm. Christopher Alexander, commander of Carrier Strike Group Nine, said the three nations conducted undersea warfare exercises, maritime interdiction operations, search and rescue drills and work focused on communication and data sharing. He told journalists Thursday on the Roosevelt that these drills would help improve communication among the United States and its allies and “better prepare us for a crisis in the region.”