Rubuta ci gaba don wannan sakin layi - A Arewacin Turai, Konrad na Masovia ya ba Chelmno ga Teutonic Knights a 1226 a matsayin tushe don Crusade a kan Tsohon Prussians da Grand Duchy na Lithuania. Lithuanians sun ci nasarar Livonian Brothers of the Sword, don haka a cikin 1237 Gregory IX ya haɗu da ragowar umarnin a cikin Teutonic Order a matsayin Livonian Order. A tsakiyar karni, Knights na Teutonic sun kammala cin nasarar su na Prussians kafin cin nasara da juyar da Lithuanians a cikin shekarun da suka gabata. Har ila yau, umarnin ya shiga rikici da Cocin Orthodox na Gabas na Jamhuriyar Pskov da Novgorod. A cikin 1240 sojojin Orthodox na Novgorod sun kayar da 'yan Sweden Katolika a Yaƙin Neva, kuma, shekaru biyu bayan haka, sun kayar da Livonian Order a Yaƙin kan kankara
Ka yi haƙuri. Union of Krewo a cikin 1386, wanda ya kawo manyan canje-canje guda biyu a cikin tarihin Grand Duchy na Lithuania: tuba zuwa Katolika da kuma kafa ƙungiyar daular tsakanin Grand Duchy na Lithuania da Crown na Masarautar Poland ya nuna alamar mafi girman girman yanki na Grand Duchy da kuma nasarar da Teutonic Knights a cikin yakin Grunwald a 1410.