The Valiant Shield war games will resemble exercises held in the vicinity of the U.S. territory last June. Those brought together some 28 ships, 280 airplanes and 22,000 troops.

Adm. Gary Roughead, announcing the exercises in an interview with The Associated Press, said the Navy learned a great deal from last year's large-scale exercises and wanted to hold similar drills again to improve on some of the tactics used.

"It was very important I think to take that information and while everything was still fresh to say let's go ahead and do things again," Roughead said.

The war games will only involve U.S. troops but will include forces from different services. The Marine Corps and Air Force participated in last year's drills.

Last year's exercises — the first Valiant Shield — were the largest the United States has had in the Pacific since the Vietnam War.

The war games underscore the Navy-boosted presence in the Pacific.

The Navy is moving forward with plans to base a majority of its nuclear-powered attack submarines in the ocean by 2010. It also intends to have six out of 11 of its aircraft carriers in the Pacific.

Just last month, the Navy announced plans to base the USS Carl Vinson in San Diego after it undergoes maintenance in Virginia. The Vinson's move to California would bring to six the number of Pacific-based carriers.

The Navy already has two carriers in San Diego, two in Washington state, and one based in Yokosuka, Japan.

Roughead, who is due to leave Hawai'i next month to become the U.S. Fleet Forces commander in Norfolk, Va., included last year's Valiant Shield exercises among the highlights of his accomplishments at the Pacific Fleet.

He also cited the fleet's use of its ballistic missile tracking systems to track North Korea's launch of missiles last July and his sailor's humanitarian work with the USNS Mercy as accomplishments.

But Roughead said the sailors deserved the praise.

"It really had been great being out here and being able to watch the men and women of our Navy go do so many things and to do it really well," Roughead said. "The credit goes to the sailors who are out there making it happen."

At Fleet Forces Command, Roughead will be responsible for planning how the Navy trains and equips its sailors in upcoming years. He will also direct Navy ships in the Atlantic, reporting to the U.S. Northern Command.

Past fleet force commanders include former Pacific Commander Adm. William J. Fallon, who last month took over as the new top U.S. military officer for the Middle East.

The Pacific Fleet oversees more than 190,000 sailors and Marines and some 30,000 civilians. It also includes more than 190 ships and submarines and 1,400 aircraft.