Dagaalkii ugu dambeeyay ee u dhexeeyay boqortooyooyinkii Roomaanka iyo Faariska wuxuu ku dhammaaday guul ay gaareen boqortooyooyinkii Byzantine: Emperor Heraclius wuxuu dib u helay dhammaan dhulalkii lumay, wuxuuna ku soo celiyay iskutallaabta runta ah Yeruusaalem 629. Si kastaba ha noqotee, labada boqortooyo midkoodna fursad uma helin inuu soo kabsado, maadaama dhawr sano gudahood ay isku arkeen inay la dagaalamaan Carabta (oo dhowaan ay midoobeen Islaamku), taas oo, sida uu sheegay Howard-Johnston, "waxaa la mid noqon kara oo keliya tsunami aadanaha". Sida laga soo xigtay George Liska Muhammad, oo ah Carabta Carabta ah ee Carabta ah ee Carabta ah ee Carabta ah ee Carabta ah ee Carabta ah ee Carabta ah ee Carabta ah ee Carabta ah ee Carabta ah ee Carabta ah.
Abuu Bakar