[16] For centuries, the Sabaeans controlled outbound trade across the Bab-el-Mandeb, a strait separating the Arabian Peninsula from the Horn of Africa and the Red Sea from the Indian Ocean.
After the Roman expedition – perhaps earlier – the country fell into chaos and two clans, namely Hamdan and Himyar, claimed kingship, assuming the title King of Sheba and Dhu Raydan.
Yemeni tribes played a pivotal role in the Islamic conquests of Egypt, Iraq, Persia, the Levant, Anatolia, North Africa, Sicily and Andalusia.
In 1060, Ali ibn Mohammed Al-Sulayhi conquered Zabid and killed its ruler Al-Najah, founder of the Najahid dynasty, whose sons were forced to flee to Dahlak.
[76] Arwa al-Sulayhi is still remembered as a great and much loved sovereign, as attested in Yemeni historiography, literature, and popular lore, where she is referred to as Balqis al-sughra , that is "the junior queen of Sheba".
The chronicles mention luxury goods such as textiles, perfume and porcelain, coming from places like North Africa, Egypt, Iraq, Oman, Kirman, and China.
[86] The Ayyubid rule was stable in southern and central Yemen where they succeeded in eliminating the mini-states of that region, while Ismaili and Zaidi tribesmen continued to hold out in a number of fortresses.
[95] When the news of his death reached the Zaydi imam Al-Mutawakkil al-Mutahhar bin Yahya he commented by saying:[95] The greatest king of Yemen, the Muawiyah of the time, has died.
[92] The Kings themselves were learned men in their own right who not only had important libraries but who also wrote treatises on a wide array of subjects, ranging from astrology and medicine to agriculture and genealogy.
[96] The dynasty became increasingly threatened by disgruntled family members over the problem of succession, combined by periodic tribal revolts, as they were locked in a war of attrition with the Zaydi imams in the northern highlands.
[106] The Mamluk army with the support of forces loyal to Zaydi Imam Al-Mutawakkil Yahya Sharaf ad-Din conquered the entire realm of the Tahiride but failed to capture Aden in 1517.
The Ottomans had two fundamental interests to safeguard in Yemen: The Islamic holy cities of Mecca and Medina and the trade route with India in spices and textiles, both of which were threatened and the latter virtually eclipsed by the arrival of the Portuguese in the Indian Ocean and the Red Sea in the early part of the 16th century.
Imam al-Mutawakkil Yahya Sharaf ad-Din ruled over the northern highlands including Sana'a while Aden was held by the last Tahiride Sultan 'Amir ibn Dauod.
[118] Disregarding the delicate balance of power in Yemen by acting tactlessly, he alienated different groups within Yemeni society, causing them to forget their rivalries and unite against the Turks.
[121] Lala Kara Mustafa Pasha, the Ottoman governor of Syria, was ordered by Selim II to suppress the Yemeni rebels,[122] the Turkish army in Egypt was reluctant to go to Yemen however.
[146][147] An incident played into British hands when, while passing Aden for trading purposes, one of their sailing ships sank and Arab tribesmen boarded it and plundered its contents.
Ahmed Izzet Pasha proposed that the Ottoman army should evacuate the highlands and confined itself to Tihama and not to be unnecessarily burdened with continuing military operation against the Zaydi tribes.
This created a great deal of anxiety for the British, who interpreted it as clear recognition of Imam Yahya's claim to sovereignty over Greater Yemen which included the Aden protectorate and Asir.
According to Bernard Reich, Professor of Political Science and International Affairs at George Washington University, Yahya could have done better by reorganizing the Zaidi tribes of the northern highlands as his ancestors did against the Turks and British intruders and turn the lands they captured into another graveyard.
Muslim Brotherhood operatives in Yemen aligned themselves with the urban opposition and supported Zaidi prince Abdullah bin Ahmad al-Wazir, who joined those actively seeking to overthrow Imam Yahya.
[181] The Hamidaddin royalists were supported by Saudi Arabia, Britain, and Jordan (mostly with weapons and financial aid, but also with small military forces), whilst the republicans were backed by Egypt.
The government of Prime Minister Haydar Abu Bakr Al-Attas became ineffective due to political infighting[192] An accord between northern and southern leaders was signed in Amman, Jordan on 20 February 1994, but this could not stop the civil war.
[203] Some news reports have suggested that, on orders from U.S. President Barack Obama, U.S. warplanes fired cruise missiles at what officials in Washington claimed were Al Qaeda training camps in the provinces of Sana'a and Abyan on 17 December 2009.
The rebels continued to apply pressure on the weakened government until, after his presidential palace and private residence came under attack from the militant group, Hadi resigned along with his ministers in January 2015.
[217][218] However, Hadi escaped to Aden, where he declared he remains Yemen's legitimate president, proclaimed the country's temporary capital, and called on loyal government officials and members of the military to rally to him.
The uprising was initially against unemployment, economic conditions, and corruption, as well as against the government's proposals to modify the constitution of Yemen so that Saleh's son could inherit the presidency.
In October 2011, Yemeni human rights activist Tawakul Karman won the Nobel Peace Prize and the UN Security Council condemned the violence and called for a transfer of power.
On 23 November 2011, Saleh flew to Riyadh, in neighbouring Saudi Arabia, to sign the Gulf Co-operation Council plan for political transition, which he had previously spurned.
By 2012, there has been a "small contingent of U.S. special-operations troops" – in addition to CIA and "unofficially acknowledged" U.S. military presence – in response to increasing terror attacks by AQAP on Yemeni citizens.
[223] Following the election of new president Abd Rabbuh Mansur Hadi, the Yemeni military was able to push Ansar al-Sharia back and recapture the Shabwah Governorate.