Which resource of production is the only one that nations can significantly increase in the short-term?

Why do you think previous leaders of the country did not want the "common man" to vote?

Trench warfare began after germany failed in its initial plan to seize france and bring a quick end to the war. negotiate a temporary truce with the allied forces. attack the allies by sea with its powerful navy. storm across the eastern front to attack russia.

As the tide of the seven years’ war (french and indian war) turned in britain’s favor, the iroquois