Answer: invading

AnswerCrossword Clue
invading(of an armed force or its commander) Enter (a country or region) so as to subjugate or occupy it
invading(of a parasite or disease) Spread into (an organism or bodily part)
invadingINVADE, to enter by military force
invadingEnter (a place, situation, or sphere of activity) in large numbers, esp. with intrusive effect
invading(of a person or emotion) Encroach or intrude on