The over welming suppy of clay and a new empor
It meant that as soon as one country falls under communist control, another country would fall and so on. Vietnam at the time was split into North (communist) and South (being attacked by North) and the US didn't want communism to spread, reasoning that it might eventually come to the US if nothing was done.
Germany's invasion of Poland in 1939 led to the outbreak of World War II
