The phrase "massive infantry" is grammatically correct and can be used in written English.
It is typically used to describe a large and powerful military force consisting of ground troops. Example: The enemy was no match for the massive infantry that descended upon their borders, equipped with the latest weapons and training.
The battle marked the emergence of Sweden as a great power and the triumph of the new Swedish flexible linear tactics over the old massive infantry formations that had long dominated European warfare.
The Viet Minh 312th Division then launched a massive infantry assault, using sappers to defeat French obstacles.
The Charge: Late in the afternoon, after an entire day of massive infantry battle above and below the ground, the exhausted Polish-German forces let out a cheer.
Gustav Adolf then personally led a furious counterattack around Tilly's left, captured the Saxon guns lost earlier, as well as the imperial artillery, and mowed down the massive imperial infantry squares.
Cao's first tactical mistake was converting his massive army of infantry and cavalry into a marine corps and navy: with only a few days of drills before the battle, Cao Cao's troops were ravaged by sea-sickness and lack of experience on water.
First came the Soviet Union, assumed capable of launching a massive tank-and-infantry invasion of Japan via its northern island of Hokkaido.
The attacks employed massive artillery bombardments and massed infantry advances.
Britain's economic interests were protected by a massive military presence, with 69 line infantry regiments serving there between 1793 to 1801, and another 24 between 1803 to 1815.
During the massive Confederate artillery bombardment that preceded the infantry assault, Hancock was prominent on horseback in reviewing and encouraging his troops.
In the post-Vietnam nineteen-seventies, the Soviet-led forces of the Warsaw Pact conducted a steady, massive buildup of heavy forces — tanks and mechanized infantry — along the western edge of East Germany and Czechoslovakia.
The infantry assault was preceded by a massive artillery bombardment that was meant to soften up the Union defense and silence its artillery, but was largely ineffective.
