Related Clues:
- Sudden incursion
- Damaging encroachment
- Sudden raid
- Tactical advancement
- Advance made at the expense of another
- Aggressive trespass
- Berton's The _____ of Canada
- Tactical advance
- Gradual encroachment
- Military incursion
- Encroachment, intrusion
- Encroachment by an army
- Sudden attack made into a country
- Sudden attack into a country
- Entry into foreign country to conquer it