Complex sentence: Before the enemy airplane is even within visual contact range, the pilot will consider any available information about the likely identity of the attacker: his nationality, level of training, and cultural traditions that may come into play.
Split into simpler sentences: Before the enemy airplane is even within visual contact range, the pilot will be absorbing any new information about the nationality of the attacker. If the pilot has any indication of the likely identity of the attacker he will be considering any information he may have pertaining to the cultural traditions that may come into play.