answer : foreign infectious deceases, like small pox
Explanation:
to quote some artical i found when looking uo a proper answer to this, "By far the most drastic upheavals were caused by invisible invaders, the foreign bacteria introduced from the Old World. Native populations cut off from Europe, Africa, and Asia for millennia were utterly without immunity to smallpox, measles, and other ailments the newcomers unwittingly brought across the seas. "
Out of those D since one of the biggest powers was now dead the german war effort stalled
On October 14, 1962, a spy plane flying over Cuba and found Nuclear missile sites under construction. 8 days later Kennedy sent a Naval Blockade . On October 28 Soviet announced that they were removing the missiles.
One of the major factors that made it difficult for soldiers to cross the area between the trenches was that "<span>The land was mined territory and was subject to artillery, shelling, and gunfire", since this was one of the reasons why trench warfare often led to a "standstill". </span>
