Iowa Colony High School 6

This session focuses on the key reasons surrounding the United States' involvement in World War One.
The discussion covers prior context, key events, American isolationism, and significant occurrences that shifted American public opinion.

The onset of World War One in 1914 was deeply rooted in imperialism, where Western nations sought to expand their territories globally.
An assassination (often referred to as the powder keg event) ignited existing tensions, turning regional disputes into a global conflict.
Technological advancements originally developed for civilian use were adapted for military purposes, dramatically changing warfare dynamics.

Prior to 1917, the United States maintained a policy of isolationism, limiting involvement in foreign conflicts, particularly European affairs.
The U.S. had effectively built an empire by the early twentieth century, but outside its territories, it rejected further entanglement in conflicts that did not directly threaten its interests.
At the start of the war, the U.S. maintained trade relations with both Allied and Central Powers, favoring the British and French but still engaging with the Germans.

While the U.S. acted isolationist in foreign alliances and military engagements, it was actively trading with both sides of the conflict during the years 1914-1915.
Although the U.S. did not supply arms to Germany, it continued to supply food and other non-military materials, indicating a complex relationship with both sides.
Germany's limited coastline necessitated a focus on disrupting British and French supply lines, prompting the development of a formidable submarine fleet.

Initially, Germany operated under a policy of restricted submarine warfare, wherein submarines would allow civilian vessels time to evacuate before sinking them.
However, as the war progressed and desperation grew, Germany shifted to unrestricted submarine warfare, threatening neutral and civilian shipping indiscriminately.
This escalation in tactics ultimately led to civilian casualties and significantly shifted public opinion in the United States against Germany.

The sinking of the Lusitania became a pivotal moment in the war, resulting in the deaths of nearly 100 American civilians and altering perceptions in the U.S. from neutrality to concern.
This incident showcased the dangers of unrestricted submarine warfare and highlighted the increasing risk of American involvement in the war.

Amidst growing tensions, the Zimmermann telegram marked a critical diplomatic blunder by Germany. It revealed a proposal for a military alliance between Germany and Mexico against the United States.
The telegram was intercepted and decoded by British intelligence, leading to outrage in the U.S. once it was publicized, as it signaled a direct threat to American sovereignty.
The realization that Germany sought to incite conflict on American soil solidified the U.S. position against Germany and led to calls for military engagement.

Following the impact of the Lusitania and the Zimmermann telegram, the sentiment shifted dramatically in the U.S., compelling the government towards war.
In April 1917, the United States officially declared war on Germany, actively joining the Allied Powers and marking a significant turning point in the conflict.
The session concludes by preparing to move into a classroom activity, encouraging students to engage with the material thoroughly as they explore the complexities of America's involvement in World War One.