Related Clues:
- Enter forcefully
- Enter en masse
- Enter with hostile intent
- Irrupt
- Trespass
- Become an occupying force
- Enter forcibly
- Encroach (upon)
- Push at the front?
- Storm into
- Intrude upon, as one's space
- Penetrate harmfully, country or body
- Make an impact, encroach
- Penetrate other country with armed forces
- Enter other's territory aggressively