Khalid ibn al-Walid in the context of "Wadd"

The Muslim conquest of the Levant (Arabic: فَتْحُ الشَّام, romanized: Fatḥ al-šām; lit. 'Conquest of Syria'), or Arab conquest of Syria, was a 634–638 CE conquest of Byzantine Syria by the Rashidun Caliphate.

A part of the wider Arab–Byzantine wars, the Levant was brought under Arab Muslim rule and developed into the provincial region of Bilad al-Sham. Clashes between the Arabs and Byzantines on the southern Levantine borders of the Byzantine Empire had occurred during the lifetime of Muhammad, with the Battle of Muʿtah in 629 CE. However, the actual conquest did not begin until 634, two years after Muhammad's death. It was led by the first two Rashidun caliphs who succeeded Muhammad: Abu Bakr and Umar ibn al-Khattab. During this time, Khalid ibn al-Walid was the most important leader of the Rashidun army.

The Battle of Mu'tah (Arabic: مَعْرَكَة مُؤْتَة, romanized: Maʿrakat Muʿtah, or Arabic: غَزْوَة مُؤْتَة Ghazwat Muʿtah) took place in September 629 (1 Jumada al-Awwal 8 AH), between the forces of Muhammad and the army of the Byzantine Empire and their Ghassanid vassals. It took place in the village of Mu'tah in Palaestina Salutaris at the east of the Jordan River and modern-day Karak.

In Islamic historical sources, the battle is usually described as the Muslims' attempt to take retribution against a Ghassanid chief for taking the life of an emissary. According to Byzantine sources, the Muslims planned to launch their attack on a feast day. The local Byzantine Vicarius learned of their plans and collected the garrisons of the fortresses. Seeing the great number of the enemy forces, the Muslims withdrew to the south where the fighting started at the village of Mu'tah and they were either routed or retired without exacting a penalty on the Ghassanid chief. According to Muslim sources, after three of their leaders were killed, the command was given to Khalid ibn al-Walid and he succeeded in saving the rest of the force.

The Rashidun army (Arabic: جيش الراشدين) was the core of the Rashidun Caliphate's armed forces during the early Muslim conquests in the 7th century. The army is reported to have maintained a high level of discipline, strategic prowess and organization, granting them successive victories in their various campaigns.

In its time, the Rashidun army was a very powerful and effective force. The three most successful generals of the army were Khalid ibn al-Walid, who conquered Persian Mesopotamia and the Roman Levant, Abu Ubaidah ibn al-Jarrah, who also conquered parts of the Roman Levant, and Amr ibn al-As, who conquered Roman Egypt. The army was a key component in the Rashidun Caliphate's territorial expansion and served as a medium for the early spread of Islam into the territories it conquered.

The Arab conquest of Mesopotamia was carried out by the Rashidun Caliphate from 633 to 638 AD. The Arab Muslim forces of Caliph Umar first attacked Sasanian territory in 633, when Khalid ibn al-Walid invaded Mesopotamia (then known as the Sasanian province of Asōristān; roughly corresponding to modern-day Iraq), which was the political and economic centre of the Sasanian state. From 634 to 636 AD, following the transfer of Khalid to the Byzantine front in the Levant, the hold of Arab forces on the region weakened under the pressure of Sasanian counterattacks. A second major Arab offensive in 636 and ended in January 638 with the capture of Mosul and the consolidation of Arab control over and exclusion of Sasanid influence from the whole Mosul-Tikrit region.

This was the first time since the collapse of the Neo-Babylonian Empire in 539 BC with the Battle of Opis, that Mesopotamia was a under direct rule again by Semitic-speaking people (with the exception of the short-lived Palmyrene Empire and the Abgarid ruled kingdom of Osroene), after centuries of Persian (Achaemenid, Parthian and Sasanian empires), and Roman-Greek (Macedonian, Seleucid, and Roman empires) ruling periods.

The Battle of the Yarmuk (also spelled Yarmouk; Arabic: معركة اليرموك) was a major battle between the army of the Byzantine Empire and the Arab Muslim forces of the Rashidun Caliphate, and a crucial point in the Muslim conquest of the Levant. The battle consisted of a series of engagements that lasted for six days in August 636, near the Yarmouk River (called the Hieromykes River by the Greeks), along what are now the borders between Syria and Jordan and Syria and Israel, southeast of the Sea of Galilee. The result of the battle was a decisive Muslim victory that ended Roman rule in Syria after about seven centuries. The Battle of the Yarmuk is regarded as one of the most decisive battles in military history, and it marked the first great wave of early Muslim conquests after the death of the Islamic prophet Muhammad, heralding the rapid advance of Islam into the then-Christian/Roman Levant.

To check the Arab advance and to recover lost territory, Emperor Heraclius had sent a massive expedition to the Levant in May 636. As the Byzantine army approached, the Arabs tactically withdrew from Syria and regrouped all their forces at the Yarmuk plains close to the Arabian Peninsula, where they were reinforced, and defeated the numerically superior Byzantine army. The battle is widely regarded to be Khalid ibn al-Walid's greatest military victory and to have cemented his reputation as one of the greatest tacticians and cavalry commanders in history.

The Battle of Uhud (Arabic: غزوة أحد, romanized: Ghazwat ʾUḥud) was fought between the early Muslims and the Quraysh during the Muslim–Quraysh wars in a valley north of Mount Uhud near Medina on Saturday, 23 March 625 AD (7 Shawwal, 3 AH).

Following the Muslim emigration to Medina, hostilities with the Quraysh intensified, largely due to Muslim raids on Meccan trade caravans. In 624, the Quraysh suffered a major defeat at the Battle of Badr, during which several of their leaders were killed. The following year, Abu Sufyan ibn Harb led a force of approximately 3,000 men toward Medina to avenge the loss. The two sides met near Mount Uhud, just north of the city. At the outset of the engagement, the Muslims gained the upper hand and forced the Meccan lines to retreat. A group of Muslim archers had been stationed by Muhammad on a nearby hill in order to protect the army’s rear and guard against a cavalry attack. However, believing the battle was won, many of them left their positions to collect spoils from the Meccan camp. This lapse allowed the Meccan cavalry, led by Khalid ibn al-Walid, to launch a counterattack from the rear, reversing the momentum of the battle, and disrupting the Muslim lines. The resulting chaos led to heavy losses on the Muslim side, including the death of Hamza ibn Abd al-Muttalib.