Combat is related to Enemy. Enemy is related to Soldier. Soldier is related to Recruit. Recruit is related to Employ. 
Assault is a synonym of Get. Goal would make you want to Get. Goal is the opposite of Hypothesis. 
Combat <--RelatedTo--> Enemy <--RelatedTo--> Soldier <--RelatedTo--> Recruit <--RelatedTo--> Employ 
Assault <--Synonym--> Get <--CausesDesire-- Goal <--Antonym--> Hypothesis 