Question: The Fall of Zinjibar and Jaar occurred during the unrest in Yemen that began in what year?

full_context: Document 1: Siege of Wasit: The Siege of Wasit involved the army of the Abbasid Revolution under al-Hasan ibn Qahtaba and the future Caliph al-Mansur, and the Umayyad garrison of Wasit under the last Umayyad governor of Iraq, Yazid ibn Umar ibn Hubayra. Yazid had been forced to abandon Kufa due to a rebellion by Abbasid sympathizers, and fled to Wasit, where he was besieged for 11 months, from August/September 749 to his surrender in June/July 750. The siege was marked by constant sallies and attacks, but as it progressed, the Umayyad garrison's morale collapsed and the internal divisions among the Qays and Yaman tribes began to manifest themselves. After news of the defeat of the Umayyad Caliph Marwan II at the Battle of the Zab and the Abbasid conquest of Syria arrived at Wasit, defections began. Yazid nevertheless held out for a few more months, until he received a pardon for himself and his followers from the Abbasid Caliph al-Saffah. Nevertheless, Yazid and his senior officers were executed soon after on al-Saffah's orders.
Document 2: Nasser al-Bahri: Nasser al-Bahri (1972 – December 26, 2015), also known by his "kunya" or "nom de guerre" as Abu Jandal – "father of death", was a member of al-Qaeda in Afghanistan from 1996 to 2000. He gave his bayat (secret oath of allegiance) to Osama bin Laden in 1998, an experience he describes in detail in his memoir. He was in al-Qaeda for four years, first as one of bin Laden's twelve bodyguards, and then as head of Osama bin Laden's security detail. A citizen of Yemen born in Saudi Arabia, Al-Bahri was radicalized in his teens by dissident Saudi Ulemas and participated in clandestine political activities which were funded in part by people trafficking. Having determined to become a jihadist he went first to Bosnia and then, briefly, to Somalia before arriving in Afghanistan in 1996 in the hope of joining Al-Qaeda, which he soon did. After four years, al-Bahri became "disillusioned", largely because bin Laden consolidated al-Qaeda's relationship with the Taliban by giving his bayat to its leader, Mullah Omar, but also because he had married and become a father.
Document 3: Yakla raid: The Yakla raid, or simply 2017 Yemen raid, was a United States-led Special Operations Forces operation carried out on January 29, 2017 in al-Ghayil, a village in the Yakla area of the Al Bayda province in central Yemen, during the Second Yemeni Civil War. Authorized by President Donald Trump, its goal was to gather intelligence on al-Qaeda in the Arabian Peninsula and also, as claimed by unnamed sources, targeted the group's leader, Qasim al-Raymi. The operation, the first high level counter-terrorism raid authorized by Trump, did not follow the rigorous planning procedures of the prior two administrations. United States Central Command (CENTCOM) was involved with the Special Operations Command, which oversees global counter-terrorism military operations, and the CIA.
Document 4: Jaʿār: Jaar (Arabic: جعار "Jaʿār") is a small town and capital of Khanfir District in south-western Yemen. One of the largest settlements in the Abyan Governorate, it is located in the south of the Abyan Governorate to the north of Al Kawd and the regional capital of Zinjibar. The town is located about 2 kilometres east of the right bank of the Wadi Bana.
Document 5: 23 May 2016 Yemen bombings: On 23 May 2016, two suicide bombings, conducted by the Islamic State of Iraq and the Levant, killed at least 45 potential army recruits in Aden, Yemen. The first attack, which targeted a lineup, killed 20. The second attack, which occurred inside the base, killed 25. The Islamic State of Iraq and the Levant claimed responsibility for the attack. The attack was preceded by the 2016 Yemen Police bombings in the Yemeni city of Mukalla, which killed more than 48 people and injured over 60.
Document 6: Internal conflict in Azawad: The Internal conflict in Azawad has been a two-year-long insurgency in Northern Mali between a pro-independence ultra Nationalist group, the MNLA and a coalition of Islamists terror groups. The conflict began when Northern Mali declared itself independent from the government creating the un-recognized state of Azawad. Both the Islamists and MNLA formed an alliance in combatting the Malian government. An internal conflict sprung up over the imposing of sharia law in the new state and the MNLA distancing itself from the coalition to a democratic state. Islamists gained popularity amongst anti-Tuareg tribes that helped it overthrow MNLA authority in Gao. Both sides clashed repeatedly leading to the Battle of Gao where the MNLA were driven from the North's two main cities, Gao and Timbuktu. The MNLA soon lost all of its strongholds in the North in a matter of months. They went into hiding secretly gaining support and strength. The beginning of 2013 led the start of the French intervention in Mali that ousted the Islamists from the North's cities and brought back Malian authority. The MNLA supported the French and Chadian forces in military operations against Islamists sanctuaries in the mountains. The MNLA recaptured several important towns in the Kidal Region but refused to dis-arm or hand them over to the Malian government. A series of Islamists sponsored terror attacks plagued MNLA forces for siding with the French. Checkpoints and bases were targeted with suicide bombings that targeted MNLA members. A peace deal was reached with the Malian army in June that let the army transverse freely in MNLA occupied zones that were under Malian jurisdiction. Ethnic violence sprung over the murder of a Tuareg Government officers family. The MNLA responded by harassing and murdering Fulani civilians who create a majority of Islamists rebels. The Islamists stepped up their attacks in one such instance massacring 30 Tuareg merchants. The MNLA has since been battling Islamists.
Document 7: Battle of Sana'a (2014): The Battle of Sana'a in 2014 marked the advance of the Houthis into Sana'a, the capital of Yemen, and heralded the beginning of a coup d'état that unfolded over the following months. Fighting began on 9 September 2014, when Shia protesters under the command of Abdul-Malik al-Houthi marched on the cabinet office and were fired upon by security forces, leaving seven dead. The clashes escalated on 18 September, when 40 were killed in an armed confrontation between the Houthis led by military commander Mohammed Ali al-Houthi and supporters of the Sunni hardliner Islah Party when the Houthis tried to seize Yemen TV, and 19 September, with more than 60 killed in clashes between Houthi fighters and the military and police in northern Sana'a. By 21 September, the Houthis captured the government headquarters, marking the fall of Sana'a.
Document 8: Spillover of the Syrian Civil War: The spillover of the Syrian Civil War is the impact of the Syrian Civil War in the Arab world. Since the first protests during the Arab Spring, the increasingly violent Syrian Civil War has been both a proxy war for the major Arab powers, Turkey and Iran, and a potential launching point for a wider regional war. Fears of the latter were realized when the Islamic State of Iraq and the Levant (ISIL), a Salafi Jihadist militant group and alleged former al-Qaeda affiliate, established itself in Syria in 2013, and later combined with the Iraqi Civil War into a single conflict the following year. The spillover of the Syrian Civil War is often dubbed as the Arab Winter.
Document 9: Fall of Zinjibar and Jaar: In early December 2015, two Yemeni towns, Zinjibar (the provincial capital of Abyan Governorate) and Ja'ar (a town a few km inland to the north), were captured by the jihadist group Al-Qaeda in the Arabian Peninsula (AQAP). Zinjibar was retaken by pro-government forces 14 August 2016. This was the second capture and occupation of Zinjibar during unrest in Yemen. The town was earlier taken by AQAP’s in May 2011 and held until the summer of 2012.
Document 10: Fares Mana'a: Fares Mohammed Mana'a (born February 8, 1965) is a top Yemeni arms-dealer, businessman, rebel commander and politician. He is said to be Yemen's most famous arms-dealer. Mana'a was born on February 8, 1965 in the northern city of Sa'dah and was an ally of Yemeni President Ali Abdullah Saleh and member of his ruling GPC party and served as head of his presidential committee and as head of a local council tasked with mediating a peace-deal between the Yemeni government and Houthis during the Shia insurgency in Yemen. His brother was the governor of Saada Governorate at the time.
Document 11: Yemeni Civil War (2015–present): The Yemeni Civil War is an ongoing conflict that began in 2015 between two factions claiming to constitute the Yemeni government, along with their supporters and allies. Houthi forces controlling the capital Sana'a and allied with forces loyal to the former president Ali Abdullah Saleh have clashed with forces loyal to the government of Abdrabbuh Mansur Hadi, based in Aden. Al-Qaeda in the Arabian Peninsula (AQAP) and the Islamic State of Iraq and the Levant have also carried out attacks, with AQAP controlling swathes of territory in the hinterlands, and along stretches of the coast.
Document 12: 2017 al-Jinah airstrike: On 16 March 2017, an airstrike by the United States Armed Forces killed up to 49 people in the rebel-held village of al-Jinah near Aleppo, Syria. The US military claimed the people targeted were militants belonging to the terrorist group al-Qaeda. However, the Syrian Observatory for Human Rights (SOHR), local residents and local officials have claimed that the building struck was a mosque filled with worshipers. At the time, US military claimed that the structure bombed was not a mosque itself but was next to a mosque, which was undamaged. However, on May 5, 2017, a US Central Command investigation determined that the building was indeed part of a mosque-complex. Rami Abdel Rahman, head of SOHR, claimed the structure was a mosque which held over 300 people at the time of the strike.
Document 13: Aden: Aden ( , ; Arabic: عدن‎ ‎ "ʻAdin/ʻAdan  " ] ) is a port city in Yemen, located by the eastern approach to the Red Sea (the Gulf of Aden), some 170 km east of Bab-el-Mandeb. Its population is approximately 800,000 people. Aden's ancient, natural harbour lies in the crater of a dormant volcano which now forms a peninsula, joined to the mainland by a low isthmus. This harbour, Front Bay, was first used by the ancient Kingdom of Awsan between the 5th and 7th centuries BC. The modern harbour is on the other side of the peninsula. Aden gives its name to the Gulf of Aden.
Document 14: Battle of Ajdabiya: The Battle of Ajdabiya was an armed battle in and near the city of Ajdabiya that took place as part of the Libyan Civil War. It was fought between anti-government rebels and military forces loyal to the Libyan leader Muammar Gaddafi. Following the Second Battle of Brega, in which pro-Gaddafi forces captured the town, Ajdabiya was the only major rebel-held city left en route to the rebel capital of Benghazi. The battle for Ajdabiya had been cited as a potential turning point in the conflict on which the fate of the whole rebellion against the Gaddafi government may be decided. On 26 March 2011, Libyan rebels, backed by extensive allied air raids, seized control of the frontline oil town of Ajdabiya from Colonel Muammar Gaddafi's forces. During the first phase of the battle, pro-Gaddafi forces seized the strategic road junction leading to Benghazi and Tobruk, and captured most of the city. The city centre remained in rebel hands, but was surrounded by pro-government forces and cut off from outside assistance. After the second phase, anti-Gaddafi forces recaptured the road junction and cleared loyalist forces from the city, sending them retreating down the Libyan Coastal Highway towards Sirte.
Document 15: 2015 Arish attack: The 2015 Arish attack was a terrorist attack on a hotel in the coastal city of Al-Arish, Egypt, on 24 November 2015. A group of militants approached the heavily guarded hotel with a car bomb, but Egyptian security forces opened fire at the vehicle, blowing it up before it could reach the building. One of the two attackers managed to get inside the hotel, where a number of people were injured and killed as a result of gunfire and a subsequent suicide bombing. Authorities reported at least seven dead, including two judges who had been in Al-Arish to supervise the country's second round of parliamentary elections, held the day before. The Islamic State's Wilayat Sinai offshoot claimed responsibility in a statement released later the same day.
ground_truth: 2015