Ali Abdullah Saleh in the context of "War on terror"

Yemen, officially the Republic of Yemen, is a country in West Asia. Including the Socotra Archipelago, mainland Yemen is located in southern Arabia; bordering Saudi Arabia to the north, Oman to the northeast, the south-eastern part of the Arabian Sea to the east, the Gulf of Aden to the south, and the Red Sea to the west, sharing maritime borders with Djibouti, Eritrea, and Somalia across the Horn of Africa. Covering roughly 455,503 square kilometres (175,871 square miles), with a coastline of approximately 2,000 kilometres (1,200 miles), Yemen is the second largest country on the Arabian Peninsula. Sanaa is its constitutional capital and largest city. Yemen's estimated population is 34.7 million, mostly Arab Muslims. It is a member of the Arab League, the United Nations, the Non-Aligned Movement and the Organisation of Islamic Cooperation.

Owing to its geographic location, Yemen has been at the crossroads of many civilisations for over 7,000 years. The Sabaeans formed a thriving commercial kingdom that influenced parts of modern Ethiopia and Eritrea. In 275 CE, it was succeeded by the Himyarite Kingdom, which spanned much of Yemen's present-day territory and was heavily influenced by Judaism. Christianity arrived in the fourth century, followed by the rapid spread of Islam in the seventh century. From its conversion to Islam, Yemen became a center of Islamic learning, and Yemenite troops played a crucial role in early Islamic conquests. Much of Yemen's architecture survived until modern times. For centuries, it was a primary producer of coffee, exported through the port of Mocha. Various dynasties emerged between the 9th and 16th centuries. During the 19th century, the country was divided between the Ottoman and British empires. After World War I, the Kingdom of Yemen was established, which in 1962 became the Yemen Arab Republic (North Yemen) following a civil war. In 1967, the People's Democratic Republic of Yemen (South Yemen) gained its independence from the British Aden Protectorate, becoming the first and only communist state in the Middle East and the Arab world. In 1990, the two Yemeni states united to form the modern Republic of Yemen, with Ali Abdullah Saleh serving as the first president until his resignation in 2012 in the wake of the Arab Spring.

The Yemen Arab Republic (YAR; Arabic: الجمهورية العربية اليمنية al-Jumhūriyyah al-‘arabiyyah al-Yamaniyyah, French: République arabe du Yémen), also known as Yemen (Sanaʽa) and commonly referred to as North Yemen, was a country that existed from 1962 until its unification with the People's Democratic Republic of Yemen (commonly known as South Yemen) in 1990, in the northwestern part of what is now Yemen. Its capital was Sana'a. It bordered South Yemen to the southeast, Saudi Arabia to the north and the Red Sea to the west, sharing maritime borders with Djibouti and the People's Democratic Republic of Ethiopia.

The Yemen Arab Republic was formed in 1962, when a coup in the capital Sana'a saw Nasserist military officers overthrow the monarchy and proclaim a republic. The overthrow triggered an 8-year civil war that ended with the defeat of the monarchists and the victory of pro-republican forces. The following years were marked by political instability, civil conflicts, frequent political assassinations and military coups: the country was ruled by a military junta from 1962 to 1967 and again from 1974 to 1978. Relative stability began with the rise to power of Ali Abdullah Saleh, who was able to successfully consolidate his position in the government. The YAR eventually managed to establish good relations with many Arab states and the United States, for which it served as a counterweight to communist South Yemen, but it maintained ties with the USSR, relying on the weapons it purchased from it. On May 22, 1990, the YAR united with the PDRY (South Yemen) to form the current Republic of Yemen, under the leadership of Saleh.

The Arab Spring (Arabic: الربيع العربي, romanized: ar-rabīʻ al-ʻarabī) was a series of pro-democracy anti-government protests, uprisings, and armed rebellions that spread across much of the Arab world in the early 2010s. It began in Tunisia in response to the death of Mohamed Bouazizi by self-immolation. From Tunisia, the protests initially spread to five other countries: Libya, Egypt, Yemen, Syria and Bahrain. Rulers were deposed: Zine El Abidine Ben Ali of Tunisia, Muammar Gaddafi of Libya, and Hosni Mubarak of Egypt, all in 2011; and Ali Abdullah Saleh of Yemen in 2012. Omar al-Bashir of Sudan was deposed in 2019 after a coup d'état caused by a revolution. Bashar al-Assad of Syria was deposed in December 2024 after 13 years of civil war. Major uprisings and social violence occurred, including riots, civil wars, or insurgencies. Sustained street demonstrations took place in Morocco, Iraq, Algeria, Lebanon, Jordan, Kuwait, Oman and Sudan. Minor protests took place in Djibouti, Mauritania, Palestine, Saudi Arabia and the Western Sahara. A major slogan of the demonstrators in the Arab world is ash-shaʻb yurīd isqāṭ an-niẓām! (Arabic: الشعب يريد إسقاط النظام, lit. 'the people want to bring down the regime').

The wave of initial revolutions and protests faded by mid to late 2012, as many Arab Spring demonstrations were met with violent responses from authorities, pro-government militias, counterdemonstrators, and militaries. These attacks were answered with violence from protesters in some cases. Multiple large-scale conflicts followed: the Syrian civil war; the rise of ISIS, insurgency in Iraq and the following civil war; the Egyptian Crisis, election and removal from office of Mohamed Morsi, and subsequent unrest and insurgency; the Libyan Crisis; and the Yemeni crisis and subsequent civil war. Regimes that lacked major oil wealth and hereditary succession arrangements were more likely to undergo regime change.

The Hashid (Arabic: حاشد; Musnad: 𐩢𐩦𐩵𐩣) is a tribal confederation in Yemen. It is the second or third largest – after Bakil and, depending on sources, Madh'hij – yet generally recognized as the strongest and most influential. According to medieval Yemeni genealogies, Hashid and Bakil were the sons of Jashim bin Jubran bin Nawf Bin Tuba'a bin Zayd bin Amr bin Hamdan. Member tribes of the Hashid Confederation are found primarily in the mountains in the North and Northwest of the country.

In recent times, Hashid confederation had for decades been led by the powerful Abushawareb clan. The clan's influence was built on an alliance with the former President Ali Abdullah Saleh, who relied on a coalition with the most prominent leader of the Hashid tribal confederation, Sheikh Abdullah ibn Husayn al-Ahmar, to take power in 1978. Until his death on 29 December 2007, Sheikh Abdullah served as the Speaker of Parliament and was considered Yemen's second most powerful person after President Saleh (who, along with many others in the government, also is a member of a Hashid tribe).

Al-Saleh Mosque (Arabic: جَامِع ٱلصَّالِح‎, romanized: Jāmiʿ Aṣ-Ṣāliḥ) is a modern mosque in Sana'a that is the largest in Yemen. It lies in the southern outskirts of the city, south of Al Sabeen Maternal Hospital. It was inaugurated in November 2008 by Yemeni President Ali Abdullah Saleh. The mosque, 27,300 square metres (294,000 sq ft) in size, has a central hall that is 13,596 square metres (146,350 sq ft) with an occupancy capacity of 44,000. The building cost nearly US$60 million to construct. Open to non-Muslims, the mosque is frequented by tourists, and promotes moderate Islam. After the Houthi–Saleh split in 2017 that resulted in the death of president Saleh, the Houthi-led authorities in Sana'a announced a renaming from "Al-Saleh Mosque" to "The People's Mosque" (Jami ash-Shaab), and they continue to use this name.

The Yemeni revolution (or Yemeni intifada) followed the initial stages of the Tunisian revolution and occurred simultaneously with the 2011 Egyptian revolution and other Arab Spring protests in the Middle East and North Africa. In its early phase, protests in Yemen were initially against unemployment, economic conditions and corruption, as well as against the government's proposals to modify Yemen's constitution. The protesters' demands then escalated to calls for the resignation of Yemeni president Ali Abdullah Saleh. Mass defections from the military, as well as from Saleh's government, effectively rendered much of the country outside of the government's control, and protesters vowed to defy its authority.

A major demonstration of over 16,000 protesters took place in Sanaʽa, Yemen's capital, on 27 January. On 2 February, Saleh announced he would not run for reelection in 2013 and that he would not pass power to his son. On 3 February, 20,000 people protested against the government in Sanaʽa, while others protested in Aden, a southern Yemeni seaport city, in a "Day of Rage" called for by Tawakel Karman, while soldiers, armed members of the General People's Congress and many protesters held a pro-government rally in Sanaʽa. In a "Friday of Anger" on 18 February, tens of thousands of Yemenis took part in anti-government demonstrations in Taiz, Sanaʽa and Aden. On a "Friday of No Return" on 11 March, protesters called for Saleh's ousting in Sanaʽa where three people were killed. More protests were held in other cities, including Mukalla, where one person was killed. On 18 March, protesters in Sanaʽa were fired upon, resulting in 52 deaths and ultimately culminating in mass defections and resignations.

Abdrabbuh Mansour Hadi (born 1 September 1945) is a Yemeni politician and former military officer who served as the second president of Yemen from 2012 until his resignation in 2022. He previously served as the second vice president of Yemen from 1994 to 2012 under President Ali Abdullah Saleh.

Hadi was previously the field marshal of the Yemeni Armed Forces. Between 4 June and 23 September 2011, Hadi was the Acting-president of Yemen while Ali Abdullah Saleh was undergoing medical treatment in Saudi Arabia following an attack on the presidential palace during the 2011 Yemeni uprising. On 23 November, he became Acting President again, after Saleh moved into a non-active role pending the presidential election "in return for immunity from prosecution". Hadi was "expected to form a national unity government and also call for early presidential elections within 90 days" while Saleh continued to serve as president in name only.

The Yemeni crisis began with the 2011–2012 revolution against President Abdullah Saleh, who had led Yemen for 33 years. After Saleh left office in early 2012 as part of a mediated agreement between the Yemeni government and opposition groups, the government led by Saleh's former vice president, Abdrabbuh Mansur Hadi, faced challenges in governing Yemen’s divided political landscape and addressing armed opposition from Al-Qaeda in the Arabian Peninsula and the Houthi militant movement that had been waging a protracted insurgency in the north for years.

In September 2014, the conflict escalated into a civil war when Houthi forces entered the capital of Sana'a and forced Hadi to negotiate a "unity government" with other political factions. The Houthis continued their advance and influence over government operations until, after forces aligned with the Houthis reportedly attacked his presidential palace and private residence, Hadi resigned along with his ministers in January 2015.

The Yemeni civil war (Arabic: الحرب الأهلية اليمنية, romanized: al-ḥarb al-ʾahlīyah al-yamanīyah) is an ongoing multilateral civil war that began in late 2014 mainly between the Rashad al-Alimi-led Presidential Leadership Council and the Mahdi al-Mashat-led Supreme Political Council, along with their supporters and allies. Both claim to constitute the official government of Yemen.

The civil war began in September 2014 when Houthi forces took over the capital city Sanaa, which was followed by a rapid Houthi takeover of the government. On 21 March 2015, the Houthi-led Supreme Revolutionary Committee declared a general mobilization to overthrow then-president Abdrabbuh Mansur Hadi and expand their control by driving into southern provinces. The Houthi offensive, allied with military forces loyal to former Yemeni president Ali Abdullah Saleh, began fighting the next day in Lahij Governorate. By 25 March, Lahij fell to the Houthis and they reached the outskirts of Aden, the seat of power for Hadi's government. Hadi fled the country the same day. Concurrently, a coalition led by Saudi Arabia launched military operations by using air strikes and restored the former Yemeni government. Although there has been no direct intervention by the Iranian government in Yemen, the civil war is widely regarded as part of the Iran-Saudi proxy conflict.