trespass, encroachment, violation, intrusion, usurpation (noun)

entry to another's property without right or permission

usurpation (noun)

wrongfully seizing and holding (an office or powers) by force (especially the seizure of a throne or supreme authority)

"a succession of generals who ruled by usurpation"

usurpation (Noun)

The wrongful seizure of something by force, especially of sovereignty or other authority.

usurpation (Noun)

Trespass onto another's property without permission.

usurpation

A usurper is an illegitimate or controversial claimant to power, often but not always in a monarchy. In other words, one who takes the power of a country, city, or established region for oneself, without any formal or legal right to claim it as one's own. Usurpers can rise to power in a region by often unexpected physical force, as well as through political influence and deceit.