what factors contributed to world war i?

I believe that the factors that led the world to World War 1 were Imperialism, Nationalism, Militarism, Alliances and Assassination.

the constitution of the united states gave congress the absolute authority over immigration laws

lee and grant, both of whom held the highest rank in their respective armies, had known each other slightly during the mexican-american war (1846-48) and began their dialogue by exchanging awkward personal inquiries. characteristically, grant had arrived in his mud-splattered field uniform while lee had turned out in full dress attire, complete with sash and sword.

explanation: