noun (n)

• a military action in which besieged troops burst forth from their position(noun.act)

  Synonym:
  sally
  

  source: wordnet30
• (military) an operational flight by a single aircraft (as in a military operation)(noun.act)

  source: wordnet30
• The sudden issuing of a body of troops, usually small, from a besieged place to attack or harass the besiegers; a sally.(noun)

  source: webster1913