Out at sea was the Lusitania, it had munitions and passengers going to the help the British war effort, but at 2:10 in the afternoon on May 17, 1915 a German U-20 submarine fired a torpedo at the ship. The explosion killed 1,119 out of 1,924 people on board and only left 823 survivors.
Back at home and in the early hours of the morning on July 30, 1916 two German saboteurs started a fire in the T.A. Gillespie Munitions Plant that was full of railcars that were loaded with explosives. The plant exploded killing many people and breaking a water main that flooded 4 blocks
“In their first significant action, on May 28, 1918, 4,000 American troops of the 1st division stormed the strategically important village of Cantigny on the Somme, captured it and fought off a German counterattack.” Then, “ Early in June, the U.S. 2nd and 3rd Divisions attacked the German bridgehead at the riverside town of Chateau-thierry and pushed the enemy back across the Marne and blocked the way to Paris.” After that, ”Five miles west of Chateau-thierry a forest called Belleau Wood had become a German stronghold. A brigade of American Marines attached to the 2nd division stormed the stubbornly defended wood which would change hands 6 times before the Germans were finally expelled. It took 3 weeks of bitter fighting and 10,000 american casualties before the marines finally gained control. After the war ended the French name was changed from Bois de Belleau (meaning wood of Belleau) to Bois de la Brigade Marine (meaning Wood of the Marine Brigade) in honor of the Americans who fought and died there”.