Rules implementations that vary by rule set:

OriginalRevised50th194219401914Note
Bombardment casualties fire back
Subs are always preemptiveOtherwise destroyers negate the surprise attack.
Air always hits subsDestroyers allow planes to hit subs.
Transports must be taken lastIf possible.
Aircraft Carriers take 2 hits

Notes:

Info:

Order of Loss-

Rulebook links: