American Protective LeagueAmerican entry into World War IAmerican women in World War IChemical weapons in World War IConvoys in World War IEastern Front (World War I)Espionage Act of 1917February RevolutionGerman Revolution of 1918–1919German prisoners of war in the United StatesHundred Days OffensiveMiddle Eastern theatre of World War IMilitary history of Australia during World War IMilitary history of Canada during World War IMusic of World War INaval warfare in the Mediterranean during World War INaval warfare of World War IOctober RevolutionOttoman casualties of World War IPartition of the Ottoman EmpirePolish–Soviet WarRomania in World War IRussian Civil WarRussian RevolutionSedition Act of 1918Selective Service Act of 1917Switzerland during the World WarsTechnology during World War ITreaty of TrianonU-boat campaignUnited States home front during World War IWomen in World War IWomen in the World Wars