The Issa (; also spelled Esa, or Aysa) (, ) is a northern Somali clan, a sub-division of the Dir clan family., p.169.

Overview As a Dir sub-clan, the Issa have immediate lineal ties with the Gadabuursi, Akisho, the Surre (Abdalle and Qubeys), the Biimaal (who the Gaadsen also belong to), the Bajimal, the Bursuk, the Madigan Dir, the Gurgura, the Garre (the Quranyow sub-clan to be precise as they claim descent from Dir), Gurre, Gariire, other Dir sub-clans and they have lineal ties with the Hawiye (Irir), Hawadle, Ajuran, Degoodi, Gaalje'el clan groups, who share the same ancestor Samaale.The Quranyo section of the Garre claim descent from Dirr, who are born of the Irrir Samal. UNDP Paper in Kenya http://www.undp.org/content/dam/kenya/docs/Amani%20Papers/AP_Volume1_n2_May2010.pdf

The Issa clan has produced numerous noble Somali men and women over the centuries, including multiple Kings (Ughaz). Throughout their known history the Issa were known for their military strength and viciousness, the British who came across them viewed the Issas as "one of the most fanatical and warlike tribes in north east Africa". The British also tried to invade Zeila home of the White Issa (Aysa) which the natives reigned victorious, with that there was never any attempt made to occupy the interior of the Issa country, which was mostly inhabited by the Black Issa; and not withstanding the cruel nature of the tribe, whose only aspirations in life could very accurately be summed up in the two words "Murder and Loot". With the typically villainous expression on their tribe members' faces as the British administration described. Tribal traditions with those of the Black Issa was that a young blood was not allowed to marry until he had slain a man in battle; as it was not essential to kill the man in a fair combat, this usually led to a cold-blooded killing and constant battles with neighboring tribes and ethnic groups, among the other Somali tribes such customs were unheard of, this was all in effort to keep themselves a militarized tribe. Known for their mastery in the use of poisoned arrows and their remarkable hunting abilities, the Issa stand out as a force to be reckoned with. In the lands of Arabia, they have become sought-after mercenaries, often enlisted for their combat prowess and strategic acumen. Given that they were always in a state of battle to the point it was viewed that killing was their pastime, as a way of honoring their deceased warriors, they would place upright stones, one for each victim, opposite the entrance of the deceased's dwelling. If the deceased had killed three or more men, stones would also be placed opposite each of the wives' three huts. If the deceased had killed one or more elephants, very large stones would be erected. Additionally, if any of the deceased's victims were mounted men, one upright stone surmounted by another flat stone would be put up. This practice of honoring their warriors through the placement of stones was a significant aspect of the Issa tribal traditions and culture.

History

Early 19th Century, Northern Conflicts & Engagements of the Issa Tribe

In the tumultuous era of warring Afar tribes, the Weima Danakil emerge as a prominent group maintaining a force of approximately 100 Somali archers, acting as mercenaries for various northwestern tribes, mostly the Issa. Despite attempts at assimilation, they steadfastly preserve their Somali language and prefer to intermarry within their own community, avoiding mixing with the Danakil at that time. Interestingly, the Danakil consider shooting to be unlawful and thus rely on the skilled Somalis to fulfill this role.

The Issa tradition endures with the continued utilization of bows and poisoned arrows among their ranks.Isenberg, Carl Wilhelm; Krapf, Johann Ludwig (1843). Journals of the Rev. Messrs. Isenberg and Krapf, Missionaries of the Church Missionary Society, Detailing Their Proceedings in the Kingdom of Shoa, and Journeys in Other Parts of Abyssinia, in the Years 1839, 1840, 1841, and 1842. Church Missionary Society. p. 38. In the preceding year, in 1838, a violent clash had occurred between the Debenik Weima and the Mudaito, resulting in a bloody skirmish. The casualties were substantial, with the Mudaito suffering 700 fatalities and the Debne Weima losing 140 individuals. There were discrepancies in the reported numbers, with Mahomed Ali stating that the Mudiato had 1500 casualties while the Weima had 120. During their conflicts, the Debne Weima consistently ally with the Issa against the Mudaito. In such cases, the Issa constitute approximately one-third of their combined forces.Isenberg, Carl Wilhelm; Krapf, Johann Ludwig (1843). Journals of the Rev. Messrs. Isenberg and Krapf, Missionaries of the Church Missionary Society, Detailing Their Proceedings in the Kingdom of Shoa, and Journeys in Other Parts of Abyssinia, in the Years 1839, 1840, 1841, and 1842. Church Missionary Society. p. 45.

Even so, with the Issa being against the Mudaito, it is noteworthy that the capital city of Aussa is predominantly inhabited by the Afar Mudaito having the city is divided into Assa-himera, Galeya, Dar, Koorha, and Issa. Centuries prior the Issa dynasty of Aussa faced rebellion from the Mudaitos, despite those events, the Issa still maintained a presence in Aussa, This observation was made by explorers Cornwallis and Harris R. Kirk in 1841.

Many of Issa inhabited territory the opposite coast of Ghoubbet-el-Kharab, driven by an insatiable thirst for human blood, frequently launch incursions into the territory of the Danakil. Exploiting the absence of a sentry at the far end of the beat, they stealthily descend the shaded bank of the hollow and commit the merciless act of violence. Engaged in ceaseless conflict with the Danakil, despite the outward appearance of friendship and even alliance among tribal chiefs, no opportunity is missed to retaliate against the mountain-dwelling Bedouins. Each fresh act of hostility sparks a new blood feud, with each life taken on either side demanding revenge twofold, perpetuating an endless cycle of violence.

While traveling from Tadjoura to the Ethiopian highlands of Shoa in 1841, explorer Major Y. Cornwallis Harris witnessed a harrowing ordeal. The protective escort accompanying him faced relentless attacks, with members being systematically targeted, picked off, and ultimately being killed he states the following: "Eesah, whose only honour and wealth consists in the number of foul butcheries with which their consciences are stained, and whomeven savages concur in representing as sanguinary and ferocious monsters fearing neither God nor Devil"

Arabedoura, an expansive plateau formed by volcanic materials, is covered with lush grass that serves as grazing land for the Bedouin herds. During the rainy season, the Bedouins, including the Issa nomads, migrate and settle in this region. Issa nomads can be found camping alongside the Danakiles on the pastures, as reported by explorer Rochet d'Hericourt in 1841. The Issa nomads' territory, located three leagues south of Arabedoura. Due to the asynchronous arrival of the rainy seasons in these territories, a reciprocal agreement allows the Issa nomads to bring their herds to graze among the Danakiles when vegetation flourishes with abundant rainfall. In return, the Danakils lead their cattle to the Issa nomads when their own pastures have dried up, and the rains commence to nourish their neighbors' lands. This interdependence fosters harmony between the two prominent tribes. Without this arrangement, their alliance could be endangered, potentially favoring the Issa nomads, renowned for their martial nature and remarkable archery skills, demonstrated by their adept use of bows to shoot arrows. Rochet d'Hericourt goes on to state : "The Somalis Issa, who are of a very fine race: their height is tall, their nose is almost aquiline; a large forehead with regular lines gives to their characteristic face the physical attributes of intelligence; endowed with fiery courage, they love battles, where their skill in throwing the arrow gives them a great superiority over their neighbors, who fear them."

In 1842, the Issa Somali people reside in the southern region of the Gulf of Tadjoura, extending to the territory of Weima Danakil. It is worth noting that a significant portion of the Issa Somali population recognizes Lohitu, the Sultan of Tadjoura, as their chief. Additionally, it is noteworthy that half of the Weima tribe in Tadjoura consists of Issa Somali individuals.

Mid 19th Century The Issa were the most significant component in the trade routes that connected Harar to the coastal towns of Berbera and Zeila. The trade and agricultural ties of the Somali tribes with the Afran-Qallo contributed, from the fifteenth century, to political and ethnic merging, expressed in the creation of the Oromo-Somali ethnic groups: the Girri-Jarso and the Girri-Babillee, which combined Oromo methods of agriculture while adopting Somali political institutions. The development of Somali institutions was intricately linked to the trading activities of the Issa tribe in the Zeila region. In this area, the Issa provided protection to merchants and their wares traveling along the trade routes between Zeila and the interior regions of the country. In exchange for their services, the tribe collected taxes from the traders. This arrangement helped to institutionalize and refine the role of the Abban(tribal chief) who was responsible for ensuring the welfare and safety of his people. Over time, the Abban's duties and responsibilities became more formalized and well-defined, as he had to manage the economic and political affairs of his tribe, negotiate with other tribes, and ensure the security of his people and their property. Thus, the trade activities of the Issa tribe played a significant role in the development of the social and political structures of the Somali people.Gebissa, Ezekiel. Leaf of Allah. Ohio University Press, 2001, p. 36. The Issa tribe held a virtual monopoly on camel raising in the region, and they were responsible for renting out these animals and leading convoys through the Oromo regions. However, the camels owned by the Issa were not well-suited for the hilly terrain leading up to Harar. To navigate this terrain, it was necessary to use donkeys provided by the Oromo.Coats, Peter D. “Factors of Intermediacy in Nineteenth Century Africa: The Case of the Issa of the Horn.” In Proceedings of the Second International Congress of Somali Studies, edited by Thomas Labahn, 2:180–83. Hamburg: H. Buske, 1984.

Issa - Egypt conflict, late 19th Century