Battle of Badr In 622, Muhammad bade many of his followers to migrate from Mecca to the neighboring city of Medina, 320 km (200 mi) north of Mecca. Shortly thereafter, Muhammad himself left for Medina. This migration is referred to as the "Hijra". The Quranic Verse 22:39 uttered by Muhammad sometime shortly after the migration permitted Muslims, for the first time, to take up arms in defence. During this period Muhammad employed three broad military strategies against the Meccans. Firstly, to establish peace treaties with the tribes surrounding Medina, especially with those from whom the Meccans could derive most advantage against the Muslims.
Battle of the Bridge Battle of the Bridge The Battle of the Bridge or the Battle of al-Jisr () was a battle at the bank of the Euphrates river between Arab Muslims led by Abu Ubaid al-Thaqafi, and the Persian Sasanian forces led by Bahman Jaduya. It is traditionally dated to the year 634, and was the only major Sassanian victory over the invading Muslim armies. The Muslim forces had already taken Hira and assumed control of the surrounding Arab-inhabited areas of Mesopotamia, on the banks of the Euphrates. The fall of Hira shocked the Persians, as the "youthful Yazdgard, began to take the