Operation Provide Promise was a humanitarian relief operation in Bosnia and Herzegovina during the Yugoslav Wars, from 2 July 1992, to 9 January 1996, which made it the longest running humanitarian airlift in history. By the end of the operation, aircraft from 21 countries had flown 12,886 sorties into Sarajevo, delivering 159,622 tons of food, medicine, and supplies and evacuating over 1,300 wounded people.