Answer:
because they are energetic and strong
The main way in which the French and Indian war draw the colonist closer together but increased friction with Britain is that after the war, the British raised taxes on the colonies in order to pay for the war--taxes which the colonists rallied around as being unfair. This was a major point leading to the Revolution.
From what I personally know, Germany wasn`t originally going for Stalingrad but Caucasus oil fields, but Russian forces would not surrender.
You can find all your answers about this here https://www.thoughtco.com/world-war-i-the-fourteen-points-2361398
