Twenty-two nations, 42 ships, six submarines, more than 200 aircraft and 25,000 personnel will participate in the biennial Rim of the Pacific exercise scheduled June 29 to Aug. 3, in and around Hawaii, the Navy said Tuesday.

The world’s biggest international maritime exercise will be larger than two years ago, reflecting reduced wartime commitments and the growing emphasis on the Pacific.

RIMPAC “provides a unique training opportunity that helps participants foster and sustain the cooperative relationships that are critical to ensuring the safety of sea lanes and security on the world’s oceans,” the Navy said in a news release. The series began in 1971.

This year’s exercise includes units or personnel from Australia, Canada, Chile, Colombia, France, India, Indonesia, Japan, Malaysia, Mexico, Netherlands, New Zealand, Norway, Peru, the Republic of Korea, the Philippines, Russia, Singapore, Thailand, Tonga, the United Kingdom and the United States.