What Meterial finally worked in Thomas Edison’s invention

After the united states declared war on germany, approximately how long did it take for over a million american troops to arrive in europe? a.) two months b.) two years c.) one month d.) one year

Even though both ww1 and ww2 were in many ways the same conflict with basically the same countries facing off against each other, the way each war started was significantly different. the question is how what were the differences on how they started

What lured the spanish to the area of oklahoma?