Why, according to Roosevet, should Amencans care about what is going on in Europe?

What was President Roosevelt's position on the war in Europe? "Lightning war" that emphasized the use of speed and firepower to penetrate deep into the enemy's territory. Allowed nations at war to buy goods and arms in the U.S. If they paid cash and carried the merchandise on their own ships.

Explanation :Europe first, also known as Germany first, was the key element of the grand strategy agreed upon by the United States and the United Kingdom during World War II. After the defeat of Germany—considered the greatest threat to the UK and the Soviet Union—all Allied forces could be concentrated against Japan.