in july 1992, crews and c-130s from west virginia's 167th airlift group inaugurated ang involvement in operation provide promise by flying food and relief supplies from rhein-main ab, germany to sarajevo, bosnia's capital, which had a population of 380,000. that operation expanded significantly the following february to include airdrops of food and medicine to muslim enclaves in eastern bosnia blockaded by bosnian serbs. altogether, personnel and c-130s from 12 ang units participated in provide promise. during the operation, air force, ang, and air force reserve transports flew 4,533 sorties and delivered 62,802 metric tons of cargo. they performed airlift, airdrop, and medical evacuation missions. the americans made a major contribution to the overall allied effort, which involved airmen from 21 nations. the humanitarian airlift operation accounted for about 95 percent of the aid delivered during the -year siege of sarajevo.