An early use of the An-22 was to deliver Soviet humanitarian aid to Peru in July 1970 following the Ancash earthquake . One An-22 disappeared on 18 July during these relief flights . An-22s were also used to deliver Soviet military aid to Egypt and Syria during the Yom Kippur War in 1973 , to Angola in 1975 , and to Ethiopia in 1977
Ancash earthquake
1970 Ancash earthquake
Antonov An-22