Pre-World War 1

More job opportunities for the unemployed, higher migration rates. The crime rates grew higher

Chemical weaponry (Mustard and Chlorine gas) was discovered and bombarded

Proposed Military alliance between Germany and Mexico if United States' entered the war

Created easier ways of transportation, communication, work

Creation of the steam engine led to Armored vehicles to be invented to end the stalemate in WW1

Development of chemicals, metallurgy, and electricity led to better weapons and artillery

As more and more people came to the city, they brought along their different cultures

The Industrial Revolution caused a sudden growth spurt to the population of America

An American merchant ship that carrying wheat to England, was destroyed by a German cruiser

Schlieffen Plan 2 for the attack on France to go through Belgium and Luxemburg to reach France

Trenches made to provide cover and that also formed “No Man’s Land.”

German U-boat sinks the British passenger ship Lusitania off the coast of Ireland.