World War I Assess how trench warfare and technological advancements such as gas, aircraft, machine guns, and U-boats affected the course of the
World War I Assess how trench warfare and technological advancements such as gas, aircraft, machine guns, and U-boats affected the course of the war. Describe why you think the United States entered World War I. Was it due to the sinking of the Lusitania, unrestricted submarine warfare, the Zimmerman Note,