North Yemen civil war in the context of "Kingdom of Yemen"

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 Imams of Yemen, later also titled the Kings of Yemen, were religiously consecrated leaders (imams) belonging to the Zaidi branch of Shia Islam. They established a blend of religious and temporal-political rule in parts of Yemen from 897. Their imamate endured under varying circumstances until the end of the North Yemen civil war in 1970, following the republican revolution in 1962. Zaidi theology differs from Isma'ilism and Twelver Shi'ism by stressing the presence of an active and visible imam as leader. The imam was expected to be knowledgeable in religious scholarship, and to prove himself a worthy headman of the community, even in battle if this was necessary. A claimant of the imamate would proclaim a "call" (dawah), and there were not infrequently more than one claimant.