- As Europe fell in debt from war costs, inflation plagued the continent.
- the downfall of four monarchies--in Russia in 1917, in Austria-Hungary and Germany in 1918, and in Turkey in 1922.
- It led to the Russian Revolution, the collapse of the German Empire and the collapse of the Hapsburg Monarchy, and it led to the restructuring of the political order in Europe and in other parts of the world, particularly in the Middle East.
- the French had 1.39 million military deaths in a nation of 40 million and the British had almost 800,000 dead.
- Due to the war industry in the USA grew, the women’s movement progressed, and the government adopted new diplomatic policies.