Incursion

Incursion (Lat. incursio, incursus; Ger. Einfall), militarily, the sudden, violent entry into foreign territory, see invasion and war of aggression.

Source: Georges, Karl Ernst, Kleines deutsch-lateinisches Handwörterbuch. Hannover und Leipzig 1910 (Nachdruck Darmstadt 1999)

Military Glossary