Pedzisa mutsara unotevera: Khalid akazoenda kunorwisa madzinza echiArabhu aiva echiKristu uye mauto ePersia aiva pasi peSasaniani mubani reYufratesi muIraq. Akagoverwazve naAbu Bakr kutungamirira mauto avaMuslim muSyria uye akatungamirira varume vake ikoko parwendo rusina kujairika nomurutivi rurefu, rusina mvura rwerenje reSyria, achisimudzira mukurumbira wake somunhu aifunga zvemauto. Somugumisiro wokukunda kwakasimba vaByzantine paAjnadayn (634), Fahl (634),
Damascus (634<unk>635) neYarmouk (636), vaMuslim vaitungamirirwa naKhalid vakakunda chikamu chikuru cheSyria. Akazobviswa pachigaro naOmar nekuda kwezvikonzero zvakati wandei zvinotsanangurwa neIslam yechinyakare uye zvinyorwa zvemazuva ano. Khalid akaenderera mberi nebasa semutevedzeri mukuru wemutsivi wake Abu Ubayda ibn al-Jarrah mukukombwa kweHoms neAleppo uye Hondo yeQinnasrin, zvese muna 637-638, izvo pamwe chete zvakakurumidza kudzoka kubva kuSyria kwemauto eumambo hweByzantine pasi paMambo Heraclius. Umar akadzinga Khalid pakuva gavhuna wake weQinnasrin mushure mezvo uye akafira muMedina kana Homs muna 642.