fighters

Iraqi forces backed by tribal militias during battle to retake a village from the Islamic State on the eastern bank of the river Tigris, Iraq December 7, 2016. REUTERS/Mohammed Salem

Mohammed Salem/Reuters

Iraqi forces backed by tribal militias during battle to retake a village from the Islamic State on the eastern bank of the river Tigris, Iraq. Photo Mohammed Salem/Reuters 

Houthi fighters ride on the back of a truck during a tribal gathering held to mobilize fighters for the battles against government forces, in Sanaa, Yemen November 24, 2016. REUTERS/Khaled Abdullah

Khaled Abdullah/Reuters

Houthi fighters ride on the back of a truck during a tribal gathering held to mobilise fighters for the battles against government forces, in Sana’a, Yemen. Photo Khaled Abdullah/Reuters 

Forces loyal to Libya's Government of National Accord (GNA) hold a position amid the rubble of destroyed buildings in Sirte's Al-Giza Al-Bahriya district on November 21, 2016, during clashes with Islamic State (IS) group jihadists to retake control of the Mediterranean coastal city. / AFP PHOTO / MAHMUD TURKIAMAHMUD TURKIA/AFP/Getty Images

Mahmud Turkia/AFP/Getty

Forces loyal to Libya‘s Government of National Accord (GNA) hold a position amid the rubble of destroyed buildings in Sirte’s Al-Giza Al-Bahriya district during clashes with Islamic State group jihadists to retake control of the Mediterranean coastal city. Photo Mahmud Turkia/AFP/Getty 

A Kurdish female Peshmerga soldier carries a newly internally displaced boy after she helped him to jump from the truck upon his arrival at Al Khazar camp near Hassan Sham, east of Mosul, east of Mosul, Iraq October 28, 2016. REUTERS/Zohra Bensemra

Zohra Bensemra/Reuters

A Kurdish female Peshmerga soldier carries a newly internally displaced boy after she helped him to jump from the truck upon his arrival at Al Khazar camp near Hassan Sham, east of Mosul, east of Mosul, Iraq. Photo Zohra Bensemra/Reuters 

Syrian rebel fighters demonstrate fighting capabilities during a graduation ceremony in the northern Syrian city of Idlib on October 27, 2016.  Syria's conflict erupted in March 2011 with protests calling for the ouster of President Bashar al-Assad.  / AFP PHOTO / Omar haj kadourOMAR HAJ KADOUR/AFP/Getty Images

Omar Haj Kadour/AFP/Getty

Syrian rebel fighters demonstrate fighting capabilities during a graduation ceremony in the northern Syrian city of Idlib. Omar Haj Kadour/AFP/Getty 

raqi forces deploy in the area of al-Shourah, some 45 kms south of Mosul, as they advance towards the city to retake it from the Islamic State (IS) group jihadists, on October 17, 2016. Iraqi Prime Minister Haider al-Abadi announced earlier in the day that the long-awaited operation to recapture Mosul was under way.  / AFP PHOTO / AHMAD AL-RUBAYEAHMAD AL-RUBAYE/AFP/Getty Images

Ahmad Al-Rubaye/AFP/Getty

Iraqi forces deploy in the area of al-Shourah, some 45 kms south of Mosul, as they advance towards the city to retake it from the Islamic State (IS) group jihadists. Iraqi Prime Minister Haider al-Abadi announced earlier in the day that the long-awaited operation to recapture Mosul was under way. Photo Ahmad Al-Rubaye/AFP/Getty 

Fighters from Libyan forces allied with the U.N.-backed government gesture as they advance into the last area controlled by Islamic State, in Sirte, Libya, October 14, 2016. REUTERS/Ismail Zitouny

Ismail Zitouny/Getty

Fighters from Libyan forces allied with the U.N.backed government gesture as they advance into the last area controlled by Islamic State, in Sirte, Libya.Photo Ismail Zitouny/Getty

Rebel fighters arrive in Idlib following their evacuation from Qudssaya and al-Hamah, neighbourhoods of the Syrian capital, on October 14, 2016. / AFP PHOTO/AFP/Getty Images

AFP/Getty

Rebel fighters arrive in Idlib following their evacuation from Qudssaya and al-Hamah, neighbourhoods of the Syrian capital. Photo AFP/Getty 

Tribal fighters loyal to Yemen's government and children pose for a picture in Al Khurais village of Nihm district east of the capital Sanaa January 11, 2016.

Ali Owidha/Reuters

Tribal fighters loyal to Yemen’s government and children sit on a rock in Al Khurais village of Nihm district east of the capital Sanaa on Monday

Armed Yemeni tribesmen from the Popular Resistance Committees, supporting forces loyal to Yemen's Saudi-backed President Abedrabbo Mansour Hadi flash their guns in the Dabab district in Taez province on. According to analysts recapturing the strategic province of Taez would help Yemeni pro-government forces in securing the unstable south and pave the way to the north, including the capital Sanaa

Nabil Hassan/AFP

Armed Yemeni tribesmen from the Popular Resistance Committees, supporting forces loyal to Yemen’s Saudi-backed President Abedrabbo Mansour Hadi flash their guns in the Dabab district in Taez province

Tribal fighters loyal to Yemen's government stand on a hill at the frontline of fighting against Houthi militants in the central province of Marib October 6, 2015

Reuters

Tribal fighters loyal to Yemen’s government stand on a hill at the frontline of fighting against Houthi militants in the central province of Marib in Yemen

Members of the self-proclaimed Donetsk People's Republic forces sit on an armored vehicle on the roadside near the site of the Malaysia Airlines flight MH17 plane crash outside the village of Hrabove in Donetsk region, Ukraine, July 17, 2015. The rebel-held east Ukrainian village where a Malaysian airliner was shot down honored the 298 victims at a simple ceremony on Friday as calls grew for an international tribunal to prosecute those who brought it down. After a church service in the village of Hrabove, residents joined a procession across an open field to a gravestone placed near the charred area where twisted metal and body parts came crashing down on July 17 last year.

Kazbek Basaev/Reuters

Members of the self-proclaimed Donetsk People’s Republic forces sit on an armored vehicle on the roadside near the site of the Malaysia Airlines flight MH17 plane crash outside the village of Hrabove in Donetsk region, Ukraine on Friday

Members of the Assyrian Gozarto Protecti...Members of the Assyrian Gozarto Protection Forces (GPF), consisting of Sutoro militia, a pro-government Syriac Christian movement, and other Assyrian fighters rest and drink tea before heading to reinforce pro-government forces on the front line in the battle against the Islamic State (IS) group, in the northeastern Syrian province of Hasakeh on July 13, 2015. AFP PHOTO / YOUSSEF KARWASHANYOUSSEF KARWASHAN/AFP/Getty Images

Youssef Karwashan/AFP/Getty

Members of the Assyrian Gozarto Protection Forces (GPF), consisting of Sutoro militia, a pro-government Syriac Christian movement, and other Assyrian fighters rest and drink tea before heading to reinforce pro-government forces on the front line in the battle against the Islamic State (IS) group, in the northeastern Syrian province of Hasakeh

 Foreign fighters who joined the Kurdish People's Protection Units (YPG) to fight in their ranks against jihadists and Islamist rebels in northeastern Syria take part in a training session on April 30, 2015 in the south-west Syrian region of Ras al-Ain, close to the Turkish border.    AFP PHOTO / UYGAR ONDER SIMSEKUYGAR ONDER SIMSEK/AFP/Getty Images

Uygar Onder Simsek/AFP/Getty

Foreign fighters who joined the Kurdish People’s Protection Units (YPG) to fight against jihadists and Islamist rebels in northeastern Syria take part in a training session in the south-west Syrian region of Ras al-Ain, close to the Turkish border

Shiite fighters, known as Houthis, hold up their weapons as they chant slogans at the residence of a military commander of the Houthi militant group, destroyed by a Saudi-led airstrike in Sanaa,, Yemen, Tuesday, April 28, 2015. A security official in Saudi Arabia says a soldier has been killed and another wounded in a gunfight with Shiite Houthi rebels along the kingdom's southern border with Yemen

Hani Mohammed/AP

Shia fighters, known as Houthis, hold up their weapons as they chant slogans at the residence of a military commander of the Houthi militant group, destroyed by a Saudi-led airstrike in Sanaa,, Yemen on Tuesday

A 67-year old man from Canada and a 40-year old from the UK, nick-named by Kurdish fighters as Hewal Zinar (L) and Hewal Cudi train on the outskirts of the north-western Syrian town of Tal Tamr, north of Hasakeh, near the border with Turkey, as they fight alongside People Protection Unit (YPG) fighters under the commanders, Sider and Gerzan. International fighters, some of whom are former members of the military and others with zero combat experience came to Syria to help Kurdish forces in their fight against Islamic State (IS) group jihadists. Since very few YPG fighters speak English, the foreign fighters are mostly assigned together in troops.

Uygar Onder Simsek/AFP

A 67-year-old man from Canada and a 40-year-old from the UK, nick-named by Kurdish fighters as Hewal Zinar and Hewal Cudi, train on the outskirts of the north-western Syrian town of Tal Tamr, north of Hasakeh, near the border with Turkey, as they fight alongside People Protection Unit (YPG) fighters under the commanders, Sider and Gerzan

Children look up at warplanes loyal to president Assad in Idlib countryside...Children look up at warplanes loyal to Syria's president Bashar Al-Assad in Idlib countryside, as rebel fighters try to fire at the planes, March 26, 2015. Picture taken March 26, 2015. REUTERS/Ammar Abdallah

Ammar Abdallah/Reuters

Children look up at warplanes loyal to Syria’s president Bashar Al-Assad as rebel fighters try to fire at the planes in Idlib, Syria 

Rebel fighters pray beside the al-Sayyad hill bordering the town of Morek in the northern countryside of Hama

Khalil Ashawi/Reuters

Rebel fighters pray beside the al-Sayyad hill bordering the town of Morek in the northern countryside of Hama in Syria

Members of Libyan pro-government forces, who are backed by the locals, sit together during clashes with the Shura Council of Libyan Revolutionaries in Benghazi...Members of Libyan pro-government forces, who are backed by the locals, sit together during clashes with the Shura Council of Libyan Revolutionaries in the streets of Benghazi January 19, 2015. The Shura Council of Libyan Revolutionaries is an alliance of former anti-Gaddafi rebels who have joined forces with Islamist group Ansar al-Sharia

Esam Omran Al-Fetori/Reuters

Members of Libyan pro-government forces, who are backed by the locals, sit together during clashes with the Shura Council of Libyan Revolutionaries in the streets of Benghazi. The council is an alliance of former anti-Gaddafi rebels who have joined forces with Islamist group Ansar al-Sharia

Rebel fighters carry their weapons as they move towards their positions at the frontline against forces loyal to Assad in Maysaloun neighborhood in the old city of Aleppo...Rebel fighters carry their weapons as they move towards their positions at the frontline against forces loyal to Syria's President Bashar al-Assad in Maysaloun neighborhood in the old city of Aleppo November 24, 2014.

Abdalrhman Ismail/Reuters

Rebel fighters carry their weapons as they move towards their positions at the frontline against forces loyal to Syria’s President Bashar al-Assad in Maysaloun neighborhood in the old city of Aleppo on Monday