The phrase "to fight the invaders" means to resist and engage in a battle or conflict against those who have come to attack or take over a place. Full definition
These cells fight invaders like bacteria and viruses, so when their number is reduced by the distemper virus a cat is vulnerable to other infections. (pethelpful.com)
Israel convicting palestinians of terrorism carries as much weight as Nazis convicting the French resistance fighters as terrorists when all they were doing was fighting an invader out of their land. (religion.blogs.cnn.com)
Gene - editing tools heralded as hope for fighting invader rats, malarial mosquitoes and other scourges may be too powerful to use in their current form, two new papers warn. (sciencenews.org)