Answer: invaders

AnswerCrossword Clue
INVADERSUnwelcome visitors
INVADERSAttacking forces.
INVADERSNormans, for example
INVADERSMartians, in "The War of the Worlds"
INVADERS"Space ....." (arcade classic)
INVADERSRoy Thinnes TV series with The
invadersINVADER, one who invades (to enter by military force)
invadersto enter and cause harm
invadersto enter as an enemy