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They're tough, but obviously still carbon based lifeforms with organs etc. They also don't appear to show much in the way of intelligence. Their lack of intelligence is a critical factor.
They would have no recourse against armored vehicles. So tanks would mess them up.
They would be very prone to landmines and other ordinance style attacks. Simple make noise in the middle of a mine field and boom. Or make noise and attract them and drop bombs on them from bombers high in the air.
Attack helicopters would shred them to pieces. Have one hover above the ground and that's dozens dead just right there.
It would also take about 5 minutes for people to figure out certain frequencies harm them
