How did nationalism contribute to global conflicts following World War I?

All of the following regions are labeled correctly on the map above, except a. highlands – 1 b. semiarid – 2 c. polar ice cap – 4 d. subarctic – 5

Which one of these were common aspects of war efforts during world war 1 1. rationing 2. war bonds 3. using schools as military facilities 4. child soldiers 5. women working in factories circle all that apply

Brainliesttt !me : ) what brought about the end of the soviet union?