Afonso CostaAfrican theatre of World War IAlain-FournierAlbert BallinAleksei BrusilovAlexis-Armand_CharostAll Quiet on the Western FrontAnnie BesantAnton DenikinArab BureauArditiArmenian_Revolutionary_FederationArmée d'Orient (1915–1919)Arthur BalfourAskariAugust BormsAustralian and New Zealand Army CorpsBalkan WarsBaltic statesBaltische LandeswehrBarbed wireBelgian Armed ForcesBerlin CommitteeBernard BaruchBernhard von BülowBerthold von DeimlingBlack and TansBlaise CendrarsBonar_LawBosnian-Herzegovinian InfantryBosnian CrisisBrazil during World War IBritish Expeditionary Force (World War I)