 Complete the following phrase:  During the IranIraq War, Iran made heavy use of its US-bought equipment, and lost at least eight CH-47s during the 19801988 period, most notably during a clash on 15 July 1983, when an Iraqi Mirage F1 destroyed three Iranian Chinooks transporting troops to the front line, and on 2526 February 1984, when Iraqi MiG-21 fighters shot down two examples. On 22 March 1982, in 