Yes, Blue on Blue is a Friendly Fire and I got it in my long time SP playing just VERY few times. I take care after my first amicide incident when back in good old SP1 a Thunderbolt hit Sherman with 5inch rockets. The Sherman survived but since that time I take care.
OTOH I have seen many friendly fire incident on AI side, recenty in a large battle Czechoslovakia-Egypt in 1986 IIRC, Egypt got 8 F-16's, 3 of them have attacked one T-72 (and only suppressed it), 2 others have attacked other T-72 (and suppressed it), one attacked Egyptian T-62 (and missed), other two went massacring Egyptian APC's
