Editing 633 (section)

==== Arabia ====
* [[Ridda wars#Hadhramaut|Ridda Wars]]: [[Abu Bakr]], [[caliph]] (''khalifa'') of the [[Rashidun Caliphate]], launches a military campaign against the [[Arab people|Arab]] tribe of [[Kinda (tribe)|Kinda]], which inhabits the region of [[Najran]] ([[Yemen]]).  
* [[March 18]] &ndash; The [[Arabian Peninsula]] is united under the central authority of Abu Bakr. This sets the stage for the [[Muslim conquest of Persia|Islamic conquest of Persia]] and the [[Sassanid Empire#Decline and fall (622–651)|fall of the Sassanid dynasty]]. 
* [[April]] &ndash; [[Battle of Chains]] ([[Kuwait]]) and [[Battle of River]] ([[Iraq]]): A [[Muslim]] army (18,000 men) under [[Khalid ibn al-Walid]] invades [[Mesopotamia]], and wins decisive victories.<ref>Roberts, J: "History of the World." Penguin, 1994</ref>
* [[May]] &ndash; [[Battle of Walaja]]: The [[Rashidun army|Rashidun Caliphate army]] under Khalid defeats the [[Sassanid Empire|Persians]] and their [[Arab Christians|Arab Christian]] allies. The [[Military of the Sassanid Empire|Persian army]] is at least three times the size.<ref name=Campaigns>[http://www.witness-pioneer.org/vil/Articles/companion/12_abu_bakr.htm Campaigns in Eastern Iraq], "Khalifa Abu Bakr", ''Companion of the Prophet''. Virtual library of Witness-Pioneer.</ref>
* [[Battle of Ullais]]: Forces of the [[Rashidun Caliphate]] under Khalid defeat an entire Persian army (70,000 men{{sfn|al-Tabari Vol.&nbsp;2|p=562}}) near the river [[Euphrates]]. Khalid besieges the city of [[Al-Hirah|Hira]].
* [[Battle of Hira|Siege of Hira]]: The Muslim Arabs (15,000 men) under Khalid attack the fortress city of Hira. After a brief fight the citizens surrender, and bring gifts to Khalid.<ref>The Caliphate, Its Rise, Decline, and Fall. From Original Sourcesby William Muir, p. 56</ref>
* [[July]] &ndash; [[Battle of Al-Anbar|Siege of Anbar]]: A Muslim Arab army under Khalid besieges the fortress city of [[Anbar (town)|Anbar]]. The Persian [[governor]] surrenders and is allowed to [[Retirement|retire]].<ref>Annals of the Early Caliphate by William Muir, p. 85</ref>
* [[Battle of Ayn al-Tamr|Battle of Ein ut Tamr]]: The Muslim army attacks a Persian frontier post located south of Anbar. The Arab Christian [[auxiliaries]] are overrun and surrender.
* [[August]] &ndash; [[Battle of Dawmat al-Jandal|Battle of Dumat Al-Jandal]]: A Muslim army (10,000 men) under Khalid defeats the rebel Arab Christians at [[Dumat Al-Jandal]] ([[Saudi Arabia]]). 
* [[November]] &ndash; [[Battle of Muzayyah]], [[Battle of Saniyy]], and [[Battle of Zumail]]: Khalid coordinates successful night attacks against the Arab Christians.