to guard, protect, (a person, thing)

protect

to go beyond, use more than, what is right or natural

invade another's property, business

to start and organize (something); to settle, place, (a person or oneself) (in a position, place etc)

set up, organize

to strengthen (a place) against attack (with walls, weapons etc)

make strong and secure; add to

to break (a rule etc)

violate

(to cause oneself, something) to enter when not invited or wanted

trespass, interrupt

to enter (a country) with armed forces in order to attack

attack and encroach