 Hondo dzepasi pemvura muHondo yeNyika I dzainyanya kurwisana pakati peGermany neAustria-Hungary U-boats uye kutakura zvikepe zvaienda kuUnited Kingdom, France, neRussia. Ngarava dzepasi pemvura dzeBritain nedzeMubatanidzwa dzakaita mabasa akapararira muBaltic, North, Mediterranean neBlack Seas pamwe chete neAtlantic Ocean. Zviito zvishomanene bedzi zvakaitika kunze kwenzvimbo huru yeEurope neAtlantic. Kurwiswa kwezvikepe zvepasi pegungwa zveGermany nengarava dzevatengesi dzeAllied, zvikurukuru kunyura kweLusitania, vakashandura pfungwa dzevanhu veAmerica vachipesana neCentral Powers. U.S. yakarayira kuti imire, uye Germany yakaita saizvozvo. Admiral Henning von Holtzendorff 18531919, mukuru mukuru weAdmiralty, akataura zvinobudirira muna Ndira 1917 kuti atangezve kurwisa uye nokudaro kuuraya nzara maBritish. Mutungamiri mukuru weGermany akaziva kuti kutangazve kwehondo yezvikepe zvisingabvumirwi kunoreva hondo neUnited States asi akaverenga kuti kuunganidzwa kweAmerica kwaizononoka kumisa kukunda kweGermany kuWestern Front uye yakaita basa guru muUnited States kupinda muhondo muna April 1917. 