Kev tsaws khoom siv tes ua yog cov nkoj me me uas siv los thauj lossis nqa tub rog hla dej hiav txwv. Lawv feem ntau yog siv thaum muaj kev tawm tsam amphibious los thauj lossis nqa cov tub rog hauv av (xws li infantry thiab armored tsheb) los ntawm ntug dej hiav txwv. Cov kev siv tseem ceeb thiab dav suav nrog Normandy tsaws hauv Fab Kis thaum Ntiaj Teb Tsov Rog II, kev ua haujlwm hauv Mediterranean tawm tsam North Africa thiab Ltalis, thiab Tsov Rog Pacific ntawm Tebchaws Meskas thiab Nyij Pooj. Tom qab Tsov Rog Thoob Ntiaj Teb thib 2, cov khoom siv dav hlau tsaws tsoos kuj tau ua lub luag haujlwm hauv Kaus Lim Kauslim thiab Lub Yim Hli 23 Artillery Sib Tw, hloov pauv txoj kev ua tsov rog ntawm Kinmen thiab Incheon pem hauv ntej.
Lub nkoj tsaws yog ib lub nkoj me me uas tsim los thauj cov tub rog tsaws, lawv cov riam phom thiab khoom siv, thiab khoom siv. Kev tsaws khoom siv tes ua tuaj yeem tsaws cov tub rog ncaj qha thiab lawv cov khoom siv ntawm lub puam. Lawv tuaj yeem siv rau ntawm ntug dej - mus rau - ntug dej hiav txwv, thauj tub rog, tsheb, tank, thiab khoom siv ncaj qha; los yog raws li lub tsheb thauj mus los hauv nkoj - mus rau - ntug dej tsaws tsag. Kev tsaws khoom siv tau tshwm sim ua ntej Ntiaj Teb Tsov Rog II. Thaum tsov rog, Tebchaws Meskas, Tebchaws Askiv, Nyij Pooj, thiab lwm lub tebchaws tau tsim muaj kwv yees li 100,000.
