In South Vietnam, B-52's were often dispatched against concentrations of North Vietnamese and Vietcong troops.

Serbian forces continued today to move against suspected concentrations of guerrillas.

Against such concentrations, and for the night, we all dug foxholes beside our vehicles, which provided some protection.

Those drones are worth their weight in gold, but they're sitting ducks against shipbome surface-to-air concentrations.

Like his dedicated ancestors he had defended Bora Bora against all cabals and concentrations.

Mounted on small missiles, they can be used in the battlefield against concentrations of troops.

The marines could be used to press the fight against small concentrations of Taliban.

While the gas masks were effective against low concentrations of carbon monoxide, they could not cope with a concentration greater than 2%.

Two combat groups were formed to strike against Partisan concentrations near Lokve.

Against overwhelming odds, Williams led his PBRs several times against concentrations of enemy junks and sampans.