Answer:
Healthy peacetime life for every nation in the world
Explanation:
Lmk if its right
Nationalism in the Balkans in the late 19th century led to a number of nations gaining their independence from the Ottoman Empire.
Either the trench(it was after all trench warfare) the first tanks, or the airplane,all were used in the war, and it was the first time any were used, including long range artillery, and flamethrowers<span />