Abu Omar al-Shishani

According to Business Insider, Batirashvili's Unit inflicted serious damage on the Russians, and among the actions they participated in was an attack on a column of the Russian 58th Army during which the commander of the 58th Army, General Anatoly Khrulyov, was wounded.

Batirashvili was never decorated for his military service.

Tarkhan Tayumurazovich Batirashvili (თარხან ბათირაშვილი; 11 January 1986 – 10 July 2016), known by his nom de guerre Abu Omar al-Shishani (أَبُو عُمَرَ ٱلشِّيشَانِيِّ) or Omar al-Shishani, was a Georgian-Chechen jihadist who served as a commander for the Islamic State, and was previously a sergeant in the Georgian Army.

Tarkhan Tayumurazovich Batirashvili was born in the Georgian SSR, Soviet Union (now Georgia) in 1986.

His father, Teimuraz Batirashvili, was a Muslim Kist—an ethnic Chechen subgroup from Georgia's Pankisi Gorge—of the Mastoy clan.

His mother was an ethnic Georgian Orthodox Christian.

Batirashvili grew up in the largely Kist-populated Muslim village of Birkiani, in the Pankisi Gorge in an impoverished region of northeast Georgia.

He was one of three sons, all of whom would convert to Islam against their mother's wishes later in life.

During his childhood, his father was rarely present, as he spent long periods of time working in Russia, and the children were mostly raised by their mother.

In his youth, he worked as a shepherd in the hills above the gorge.

Later in the 1990s, the Pankisi Gorge was a major transit point for rebels participating in the Second Chechen War, and it was there that Batirashvili reportedly came into contact with the Chechen rebels moving into Russia.

According to his father, a young Batirashvili secretly helped Chechen militants into Russia and sometimes joined them on missions against Russian troops.

After finishing high school, Batirashvili joined the Georgian Army and distinguished himself as master of various weaponry and maps, according to his former commander Malkhaz Topuria, who recruited him into a special reconnaissance group.

His Unit received training at the Krtsanisi National Training Centre, which included training with US special forces.

Batirashvili was reportedly a "star pupil".

A veteran of the 2008 Russo-Georgian War, Batirashvili became a jihadist after being discharged from the Georgian military and served in various command positions with Islamist militant groups fighting in the Syrian Civil War.

He became the leader of the Muhajireen Brigade (Emigrants Brigade), and its successor, Jaish al-Muhajireen wal-Ansar (Army of Emigrants and Supporters).

He rose to the rank of sergeant in a newly formed intelligence Unit, and during the 2008 Russo-Georgian War he served near the front line in the Battle of Tskhinvali, spying on Russian tank columns and relaying their coordinates to Georgian artillery units.

He was due to be promoted to become an officer, but in 2010 he was diagnosed with tuberculosis.

After spending several months in a military hospital, he was discharged on medical grounds.

He tried and failed to re-enlist.

Upon returning home, he applied for a job in the local police force and was rejected.

Around this time, his mother also died of cancer.

According to his father, he became "very disillusioned".

According to the Georgian Defense Ministry, Batirashvili was arrested in September 2010 for illegal possession of weapons and sentenced to three years in prison.

He was released after serving in early 2012 and immediately left the country.

According to an interview on a jihadist website, Batirashvili said that prison transformed him; "I promised God that if I come out of prison alive, I'll go fight jihad for the sake of God", he said.

Batirashvili reportedly told his father that he was leaving for Istanbul, where members of the Chechen diaspora were ready to recruit him to lead fighters inside war-ravaged Syria; an older brother had already gone to Syria some months before.

In an interview, Batirashvili said that he had considered going to Yemen and briefly lived in Egypt before ultimately arriving in Syria in March 2012.

His first command was the Muhajireen Brigade, an Islamist jihadist group made up of foreign fighters that was formed in the summer of 2012.

His Unit became involved in the Battle of Aleppo, and in October 2012, they assisted al-Nusra Front in a raid on 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 2013, Batirashvili joined the Islamic State and rapidly became a senior commander in the organization, directing a series of battles and ultimately earning a seat on ISIL's shura council.

In February 2013, together with the Tawhid Brigades and al-Nusra Front, they stormed the base of the Syrian Army's 80th Regiment, near the main airport in Aleppo.

In March 2013, Kavkaz Center reported that the Muhajireen Brigade had merged with two Syrian jihadist groups called Jaish Muhammad and Kataeb Khattab to form a new group called Jaish al-Muhajireen wal-Ansar, or Army of Emigrants and Helpers.

The group played a key role in the August 2013 capture of Menagh Air Base, which culminated in a Vehicle Borne Improvised Explosive Device (VBIED) driven by two of their members killing and wounding many of the last remaining Syrian Armed Forces defenders.

A branch of the Muhajireen Brigade was involved in the 2013 Latakia offensive.

The US Treasury Department added Batirashvili to its list of Specially Designated Global Terrorists on 24 September 2014, and seven months later the US government announced a reward up to US$5 million for information leading to his capture.

There were several reports of his death throughout 2015 and 2016.

ISIL announced that he was killed in combat in the Iraqi city of Al-Shirqat, south of Mosul while the Pentagon said that Shishani had likely been killed in U.S coalition air strikes in Syria, but could not confirm or deny it.