fighters

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

J-10 fighter jets of the Bayi Aerobatic Team of PLA's (Peoples Liberation Army) Air Force perform during a flight at the Airshow China 2014 in Zhuhai, south China's Guangdong province on November 11, 2014. Global aviation firms flocked to China on November 11 to show off their wares as economic development and an expanding middle class promise a bonanza in one of the world's fastest-growing aircraft markets.  The 10th Airshow China 2014 takes place from November 11 to 16.

Johannes Eisele/AFP

J-10 fighter jets of the Bayi aerobatic team of the People’s Liberation Army Air Force perform during a flight at Airshow China in Zhuhai, Guangdong province, China

Forces of Syria's President Assad burn a flag of al Qaeda-linked Nusra Front, which they said was left behind by rebel fighters, in Zor al-Mahruqa village...Forces of Syria's President Bashar al-Assad burn a flag of al Qaeda-linked Nusra Front, which they said was left behind by rebel fighters, in Zor al-Mahruqa village, after the forces said they had regained control of the area and its surrounding hills in the Hama countryside October 6, 2014. REUTERS/George Ourfalian (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT TPX IMAGES OF THE DAY)

George Ourfalian/Reuters

Forces of Syria’s President Bashar al-Assad burn a flag of al-Qaeda-linked Nusra Front in Zor al-Mahruqa village, after they said they had regained control of the area and its surrounding hills in the Hama countryside

Shiite fighters seized control of the capital Sana a...epa04411989 Gunmen of the Shiite Houthi movement shout anti-Government slogans as they stand on a hill overlooking the capital  after they consolidated their foothold in Sana'a, Yemen, 22 September 2014. Reports state the Yemeni government and Shiite Houthi rebels on 21 September signed a UN-brokered ceasefire hours after Houthi insurgents captured major state institutions in the Arabian Peninsula country's worst crisis in three years.  The deal, including calls for an immediate ceasefire, the formation of a national unity government and economic reforms, was announced after four days of heavy fighting in Sana'a, pitting the Houthis against Sunni rivals backed by government forces.

Yahya Arhab/EPA

Gunmen of the Shia Houthi movement shout anti-Government slogans as they stand on a hill overlooking the capital after they consolidated their foothold in Sana’a, Yemen on Monday

Asaib Ahl al-Haq Shi'ite militia fighters from the south of Iraq and Kurdish peshmerga forces walk with their weapons as they take control of Sulaiman Pek from the Islamist State militants, in the northwest of Tikrit city...Asaib Ahl al-Haq Shi'ite militia fighters from the south of Iraq and Kurdish peshmerga forces walk with their weapons as they take control of Sulaiman Pek from the Islamist State militants, in the northwest of Tikrit city September 1, 2014.

Youssef Boudlal/Reuters

Asaib Ahl al-Haq Shia militia fighters from the south of Iraq and Kurdish peshmerga forces walk with their weapons as they take control of Sulaiman Pek from the Islamist State militants, in the northwest of Tikrit city

Iraqi Kurdish Peshmerga fighters take position

Ahmad AL-Rubaye/AFP/Getty Images

Iraqi Kurdish Peshmerga fighters take position as they monitor the area from their front line position in Bashiqa, a town 13 kilometres north-east of Mosul on Tuesday

An aerial display of the Republic of Korea Air Force Black Eagles flying T-50 aircraft at a media preview of the Singapore Airshow at Changi Exhibition Centre in Singapore, 11 February 2014. The Singapore Airshow runs from 11 until 16 February 2014.

Tom White/EPA

An aerial display of the Republic of Korea Air Force Black Eagles flying T-50 aircraft at a media preview of the Singapore Airshow at Changi Exhibition Centre in Singapore on Tuesday.

A Free Syrian Army fighter takes up position inside a room in Aleppo...A Free Syrian Army fighter takes up position inside a room as he aims his weapon behind sandbags in the old city of Aleppo November 29, 2013. REUTERS/Mahmoud Hebbo

Mahmoud Hebbo/Reuters

A Free Syrian Army fighter, surrounded by sandbags, takes up position as he aims his weapon into the old city of Aleppo, Syria

Islamist fighters demonstrate with their weapons during their graduation ceremony at a camp in eastern al-Ghouta, near Damascus...Islamist fighters demonstrate with their weapons during their graduation ceremony at a camp in eastern al-Ghouta, near Damascus November 28, 2013. The newly graduated fighters, who went through military training, will operate under the Islamist Ahrar al-Sham brigade. Picture taken November 28. REUTERS/Diaa Al-Din

Diaa Al-Din/Reuters

Islamist fighters show off their weapons skills at a graduation ceremony at a military training camp in eastern al-Ghouta, near Damascus, Syria. The fighters will operate under the Islamist Ahrar al-Sham brigade.