Explain one way in which alliances contributed to World War II.

Sure.

Explanation:

After the invasion of Poland, the establishment of alliances contributed to the outbreak of World War II since it led to France and Britain declaring war on Germany.

map scale refers to the relationship (or ratio) between distance on a map and the corresponding distance on the ground. for example, on a 1: 100000 scale map, 1cm on the map equals 1km on the ground.

lend lease program was passed by congress on march 11, 1941. the president could ship weapons, food, or stuff to any country whose struggle against the axis assisted u.s. defense