Also names starting with B! Maybe even alternate?
Aggressive: Buccaneer, bagpipe (no offense to Scots), beigerent, battle, bellicose, blizzard, blitz (on the nose?), bruiser, butcher, bully, breaker, blackjack (Tu160 needs a new nickname), blade, blaze, blackout (more suitable for a bomber), barbarian
Animals: Bison, bat, bear, boar, bogey (imaginary but still counts), bull, buffalo
Defensive: bulwark, bastion
Aggressive: Buccaneer, bagpipe (no offense to Scots), beigerent, battle, bellicose, blizzard, blitz (on the nose?), bruiser, butcher, bully, breaker, blackjack (Tu160 needs a new nickname), blade, blaze, blackout (more suitable for a bomber), barbarian
Animals: Bison, bat, bear, boar, bogey (imaginary but still counts), bull, buffalo
Defensive: bulwark, bastion