irruption

a sudden attack on and entrance into hostile territory the irruptions of the Goths into Italy in the fifth century Synonyms descent, foray, incursion, inroad, invasion, raidRelated Words pillage, plunder; aggression, assault, coup de main, offense (or offence), offensive, onset, onslaught, rush, siege, storm, strike; charge, sally, sortie; ambuscade, ambush, surprise (also surprize), trap; air raid, blitz, blitzkrieg, bombardment; counteraggression, counterassault, counterattack, counteroffensive, counterstrike