To help out other countries
Gold and silver
The Lusitania and the Zimmerman Note
One can be in WW1 where nationalism was one of four major reasons the war began. And the outcome of the war was the creation of many different nations.
Two major reasons for Europeans to colonize the American continent are freedom and opportunity.
Army and law
Gold,Sliver
To capture Geronimo and Santa Anna.
England and Spain had been heading toward war for years. Trading rivalry and religious differences were the two major reasons for conflict between England and Spain.
The two major deserts that enter California are the Sonoran Desert and the Mojave Desert.
because it just did
The two major rivers
1) Major trade issues 2) Shay's rebellion