The Air Force and the Marine Corps recalled Friday up to 2,150 retired servicemen for jobs on U.S. bases to replace those who left to serve in the Persian Gulf.

For now, the military is limiting its call-up of retirees - 2,000 of them Marines - to those under age 60. Each must pass a physical exam.And the number of call-ups could be sharply reduced by retirees who volunteer, military officials said. In September, the Army announced that it was recalling fewer than 500 retirees, but a wave of volunteers reduced the need to only about 100 call-ups so far.

"Quite honestly, there's such a clamor to volunteer . . . that I don't think they'll use the involuntary call-ups very much," said Maj. Doreen Burger, a Marine Corps spokeswoman.