Egypt had by far the largest and the most modern of all the Arab air forces , consisting of about 420 combat aircraft , all of them Soviet-built and with a heavy quota of top-of-the line MiG-21s .
Egypt had by far the largest and the most modern of all the Arab air forces , consisting of about 420 combat aircraft , all of them Soviet-built and with many top-of-the line MiG-21s .