Documents Unit 6: World War I (1914 – 1920) The Homefront!.

Unit 6: World War I (1914 â 1920) The Homefront! Bell Ringer: America Joins the Fight The ____ system was developed by the U.S. and used to protect troop/ supply shipments…

Documents Unit 6: World War I (1914 – 1920)

Unit 6: World War I (1914 â 1920) The Homefront! Bell Ringer: America Joins the Fight The ____ system was developed by the U.S. and used to protect troop/ supply shipments…