You must be logged on to see external links
An estimated 100,000 Russian troops are amassed on the Ukraine border. Mr Biden said if Vladimir Putin were to order them to move in “it would be the largest invasion since World War II, it would change the world.”
Off the top of my head, China invaded Vietnam with more troops, US led invasion of Iraq, Russia in Afghanistan, Russia/Warsaw Pact taking Czechoslovakia, Iraq into Kuwait, Iraq into Iran (and vice versa), Vietnam (North & South), Korea (North & South), Israel in the Six Day War (does that count?). Any others that anyone can think of that have involved more troops?