The terms of the Treaty of Paris were harsh to losing France. All French territory on the mainland of North America was lost. The British received Quebec and the Ohio Valley. The port of New Orleans and the Louisiana Territory west of the Mississippi were ceded to Spain for their efforts as a British ally.
Nazi leaders were brought to trial for war crimes committed during world war II
The main policy changed between presidents but a lot of it was containment of the spread of communism and some intervention against soviet backed coups such as Vietnam and places in Africa such as the Congo and the third was supporting EE countries and leave them open for influence by western powers and democratic powers
It challenged the concept of divine right and gave some rights to the nobility that were previously held only to the monarch.