ships : What did the US use to create the convoy system?
Germany : Which European country was the US afraid of?
propaganda : What was selling the war to the ppublic?
antiimmigranthysteria : What cause violence against foreign born americans and immigrants from Germany?
machinegun : What type of weapon changed the nature of warfare?
tank : What was one of the most innovative weapons?
observation : What type of balloons were used by both sides?
lackofsleep : What did troops suffered from?
uboat : New development in under water warfare?
flu : An epidemic that hit?
What was selling the war to the ppublic?
An epidemic that hit?
What type of weapon changed the nature of warfare?