belligerence

A hostile or warlike attitude, nature, or inclination; belligerency.

noun

1. Warlike or hostile attitude or nature: bellicoseness, bellicosity, belligerency, combativeness, contentiousness, hostility, militance, militancy, pugnaciousness, pugnacity, truculence, truculency. See attack/defend.
2. Hostile behavior: aggression, aggressiveness, belligerency, combativeness, contentiousness, hostility, militance, militancy. See attack/defend.
3. The power or will to fight: bellicoseness, bellicosity, belligerency, combativeness, contentiousness, fight, pugnaciousness, pugnacity, truculence, truculency. See conflict/cooperation.

The noun has 2 meanings:

Meaning #1: hostile or warlike attitude or nature
  Synonym: belligerency

Meaning #2: a disposition to fight
  Synonyms: aggressiveness, contentiousness, pugnacity, quarrelsomeness