Jaish al-Muhajireen wal-Ansar

Jaish al-Muhajireen wal-Ansar (جيش المهاجرين والأنصار Army of Emigrants and Supporters), formerly known as the Muhajireen Brigade, are an Islamist jihadist group made up of foreign fighters active in the Syrian civil war against the Syrian Government. The group is affiliated with the Islamic State of Iraq and the Levant.

Origin of the group
The group was established under the name Muhajireen Brigade in summer 2012, and is lead by an ethnic Chechen, Abu Omar al-Chechen (alternatively Abu Omar al-Shishani), an Islamist fighter from Georgia’s Pankisi Gorge who had fought in the First Chechen War and Second Chechen War against Russia. While Syrian jihadist groups like Ahrar al-Sham and Al-Nusra include many foreign jihadists who travelled to Syria to fight with the rebels, Jaish was established by and largely composed of non-Syrians.

Composition of the group
The group is composed of diverse nationalities. While the commander is a Chechen, other fighters are French and Turkish. Many of them are veterans from other conflicts. The Syrian rebels refer to them as "Turkish brothers." The Chechen rebel news agency, Kavkaz Center, has described the Brigade as being made up of Mujahideen from the Caucasus Emirate, Russia, Ukraine, Crimea, and other CIS countries.

Role in the Syrian civil war
The group became involved in the Battle of Aleppo against the Syrian Army. In late September 2012 in a confrontation with the Syrian Army the Muhajireen lost ten men in two days, the unit subsequently redeployed after receiving insufficient support from other rebels.

The Muhajireen went on to participate in major assaults against Syrian military bases in alliance with other Jihadist units. In October 2012 they assisted the Al-Nusra Front in a raid on the 606 Rocket Brigade, an air defense and Scud missile base in Aleppo. In December 2012, they fought alongside Al-Nusra Front during the overrunning of the Sheikh Suleiman Army base in Western Aleppo. In February 2013, together with the Tawhid Brigades and the Al-Nusra Front, they stormed the base of the Syrian military's 80th Regiment near the main airport in Aleppo.

In March 2013, Kavkaz Center reported that the Kataeb al-Muhajireen merged with two Syrian Jihadist groups called Jaish Muhammad and Kataeb Khattab, to form a new group called Jaish Muhajireen wa Ansar, or Army of Emigrants and Helpers. The group's leadership structure consists of a military leadership, a Shari’a committee, a Shura council and a media arm, Liwa al-Mujahideen al-Ilami. The latter is the same name as a media group established by foreign mujahideen fighting in the Bosnian war

The group played a key role in the August 2013 capture of Menagh Air Base, culminating with a VBIED driven by two of their members killing and wounding many of the last remaining Syrian Armed Forces defenders. A branch of the Muhajireen brigades came also known fighting in the 2013 Latakia offensive.

In August 2013, Abu Omar released a statement announcing the expulsion of one of his commanders, Emir Seifullah, and 27 of his men from the group. Abu Omar accused the men of embezzlement and of stirring up the animosity of local Syrians against the foreign fighters by indulging in takfir against other Muslims.