{ "id": "epteeyz1hf", "slug": "il-arslan", "title": "Il-Arslan", "updated": "2026-10-15", "topic_path": [ { "id": "society", "label": "Society and history", "api_url": "https://www.edgepedia.org/api/v1/topics/society" }, { "id": "society.history", "label": "History and archaeology", "api_url": "https://www.edgepedia.org/api/v1/topics/society.history" }, { "id": "society.history.other", "label": "Other history", "api_url": "https://www.edgepedia.org/api/v1/topics/society.history.other" }, { "id": "society.history.other.middle-east", "label": "Middle East and North Africa", "api_url": "https://www.edgepedia.org/api/v1/topics/society.history.other.middle-east" }, { "id": "society.history.other.middle-east.seljuk-khwarazm", "label": "Seljuk and Khwarazmian period (1037 to 1308)", "api_url": "https://www.edgepedia.org/api/v1/topics/society.history.other.middle-east.seljuk-khwarazm" }, { "id": "society.history.other.middle-east.seljuk-khwarazm.dynasties-rulers-and-events", "label": 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"Society and history", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.asia.t1000.society" }, { "id": "geo.asia.t1000.society.history", "label": "History and archaeology", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.asia.t1000.society.history" }, { "id": "geo.asia.t1000.society.history.other", "label": "Other history", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.asia.t1000.society.history.other" }, { "id": "geo.asia.t1000.society.history.other.middle-east", "label": "Middle East and North Africa", "api_url": "https://www.edgepedia.org/api/v1/geo/geo.asia.t1000.society.history.other.middle-east" } ] } ], "excerpt": "Il-Arslan (ایل ارسلان), fully Abu'l-Fath Il-Arslan, was Khwarazmshah from 1156 to 1172, son of Atsiz, ruling Khwarazm as an independent state under Qara Khitai overlordship.", "snippet": "Il-Arslan (ایل ارسلان), fully Abu'l-Fath Il-Arslan, was Khwarazmshah from 1156 to 1172, son of Atsiz, ruling Khwarazm as an independent state under Qara Khitai overlordship.", "node": "society.history.other.middle-east.seljuk-khwarazm.dynasties-rulers-and-events.rulers-and-officials", "markdown": "# Il-Arslan\n\nIl-Arslan (ایل ارسلان), fully Abu'l-Fath Il-Arslan, was the Khwarazmshah, ruler of Khwarazm, from the line of Anushtegin Garchai, reigning from 1156 to 1172.[1](https://www.iranicaonline.org/articles/il-arslan/) • [2](https://www.iranicaonline.org/articles/khwarazmshah/iii-the-line-of-anustigin/) He was the son and successor of Ala al-Din Atsiz, who had preserved the autonomy of Khwarazm, and under Il-Arslan the province became in practice an independent state, ruled under the light overlordship of the [Qara Khitai](https://www.edgepedia.org/qara-khitai) after the death of the Seljuk sultan Sanjar in 1157.[1](https://www.iranicaonline.org/articles/il-arslan/)\n\n| Key fact | Detail |\n|---|---|\n| Full name and title | Abu'l-Fath Il-Arslan, Khwarazmshah of the line of Anushtegin Garchai[1](https://www.iranicaonline.org/articles/il-arslan/) • [2](https://www.iranicaonline.org/articles/khwarazmshah/iii-the-line-of-anustigin/) |\n| Reign | AH 551–567 / 1156–1172[1](https://www.iranicaonline.org/articles/il-arslan/) • [2](https://www.iranicaonline.org/articles/khwarazmshah/iii-the-line-of-anustigin/) |\n| Accession | Recep 551 / August 1156[1](https://www.iranicaonline.org/articles/il-arslan/) • [3](https://doi.org/10.24186/vakanuvis.1413015) |\n| Predecessor | His father, Ala al-Din Atsiz[1](https://www.iranicaonline.org/articles/il-arslan/) • [2](https://www.iranicaonline.org/articles/khwarazmshah/iii-the-line-of-anustigin/) |\n| Successor | His eldest son, Ala al-Din Tekish (r. 567–96/1172–1200)[1](https://www.iranicaonline.org/articles/il-arslan/) • [2](https://www.iranicaonline.org/articles/khwarazmshah/iii-the-line-of-anustigin/) |\n| Overlordship | Tributary to the Qara Khitai, who left him largely alone so long as tribute was paid[1](https://www.iranicaonline.org/articles/il-arslan/) • [2](https://www.iranicaonline.org/articles/khwarazmshah/iii-the-line-of-anustigin/) |\n\n## Accession and family\n\nIl-Arslan was the son of Ala al-Din Atsiz, the Khwarazmshah who had skillfully preserved Khwarazm's autonomy between the Seljuk sultanate and the Qara Khitai.[1](https://www.iranicaonline.org/articles/il-arslan/) • [2](https://www.iranicaonline.org/articles/khwarazmshah/iii-the-line-of-anustigin/)\n\nOn news of his father's death he moved at once from Jand to Khwarazm, receiving oaths of allegiance from commanders and officials along the way.[3](https://doi.org/10.24186/vakanuvis.1413015) He ascended the throne in Recep 551 (August 1156), securing his position by imprisoning or executing potential rivals.[1](https://www.iranicaonline.org/articles/il-arslan/) • [3](https://doi.org/10.24186/vakanuvis.1413015)\n\n## Reign: policies, administration, and wars\n\n**Independence from the Seljuks.** Sanjar's fall, after the rebellion of the Oghuz and his death in 1157, ended effective Great Seljuk power in western Persia and left Il-Arslan a free hand.[1](https://www.iranicaonline.org/articles/il-arslan/) • [4](https://dergipark.org.tr/en/pub/vakanuvis/article/1413015) • [2](https://www.iranicaonline.org/articles/khwarazmshah/iii-the-line-of-anustigin/) In practice he ruled as an independent sovereign under the light and distant overlordship of the Qara Khitai, to whom both the Khwarazmshahs and the Qara-khanids remained tributary; the Qara Khitai left him largely alone provided tribute was paid regularly.[1](https://www.iranicaonline.org/articles/il-arslan/) • [2](https://www.iranicaonline.org/articles/khwarazmshah/iii-the-line-of-anustigin/) According to the Encyclopaedia Iranica, the change in standing shows in his own correspondence: in letters to the Qara-khanid Mahmud he signed himself mokles, \"sincere friend,\" instead of the banda, \"bondsman,\" his father had used for the Seljuk sultan.[1](https://www.iranicaonline.org/articles/il-arslan/) \n\n**Campaigns.** In 553/1158 Il-Arslan invaded Transoxania in aid of Qarluq tribal rebels against the Khan of Samarqand, Chagri Khan Ali ibn Hasan; peace was made through the mediation of the city's religious leaders.[1](https://www.iranicaonline.org/articles/il-arslan/) • [2](https://www.iranicaonline.org/articles/khwarazmshah/iii-the-line-of-anustigin/) In 560/1165 he led an abortive invasion of Khorasan against the Oghuz amirs who had assumed power there after Sanjar's death.[2](https://www.iranicaonline.org/articles/khwarazmshah/iii-the-line-of-anustigin/)\n\n**Break with the Qara Khitai.** In 566/1170 or, more probably, 567/1171, his failure to pay tribute provoked a Qara Khitai invasion of Khwarazm.[1](https://www.iranicaonline.org/articles/il-arslan/) The invasion was repelled, but Il-Arslan fell ill and returned to his capital Gurganj.[1](https://www.iranicaonline.org/articles/il-arslan/)\n\n## Political influence\n\nIl-Arslan's reign consolidated the independence his father had built: with Seljuk power collapsed after 1157, Khwarazm ceased to be a Seljuk vassal in practice, a shift documented by his own change of diplomatic style from bondsman to sincere friend.[1](https://www.iranicaonline.org/articles/il-arslan/) The Qara Khitai tribute relationship, however, endured, and it shaped the succession: his son and successor [Ala al-Din Tekish](https://www.edgepedia.org/ala-al-din-tekish) obtained his throne with Qara Khitai help and continued the expansionist policies of his father.[2](https://www.iranicaonline.org/articles/khwarazmshah/iii-the-line-of-anustigin/)\n\n## Military style\n\nAccording to *Encyclopaedia Iranica*, Il-Arslan commanded in person: he led the Transoxanian expedition of 553/1158 and the Khorasan campaign of 560/1165 himself.[2](https://www.iranicaonline.org/articles/khwarazmshah/iii-the-line-of-anustigin/) His campaigns were opportunistic interventions beyond Khwarazm, aiding Qarluq dissidents in Transoxania and striking at the Oghuz amirs of Khorasan, rather than wars of conquest; the Khorasan invasion failed, and the Transoxanian one ended in a negotiated peace mediated by Samarqand's religious leaders.[1](https://www.iranicaonline.org/articles/il-arslan/) • [2](https://www.iranicaonline.org/articles/khwarazmshah/iii-the-line-of-anustigin/)\n\n## End of the reign and succession\n\nAfter repelling the Qara Khitai invasion, Il-Arslan fell ill and died at Gurganj in 1172.[1](https://www.iranicaonline.org/articles/il-arslan/) • [2](https://www.iranicaonline.org/articles/khwarazmshah/iii-the-line-of-anustigin/) He was succeeded by his eldest son, Ala al-Din Tekish.[1](https://www.iranicaonline.org/articles/il-arslan/) • [2](https://www.iranicaonline.org/articles/khwarazmshah/iii-the-line-of-anustigin/)\n\n## Historians' assessment\n\nHis withholding of tribute late in the reign shows the limits of that arrangement, since it drew a Qara Khitai punitive invasion that he repelled but did not survive long after.[1](https://www.iranicaonline.org/articles/il-arslan/)\n\n## References\n\n1. [IL-ARSLAN – Encyclopaedia Iranica](https://www.iranicaonline.org/articles/il-arslan/)\n2. [KHWARAZMSHAHS iii. The Line of Anushtigin – Encyclopaedia Iranica](https://www.iranicaonline.org/articles/khwarazmshah/iii-the-line-of-anustigin/)\n3. [Sultan Sencer'in Vefatından Sonra Harezmşah İl-Arslan'ın Büyük Selçuklu Devleti'ne Karşı İzlediği Siyaset – Vakanüvis](https://doi.org/10.24186/vakanuvis.1413015)\n4. [Sultan Sencer'in Vefatından Sonra Harezmşah İl-Arslan'ın Büyük Selçuklu Devleti'ne Karşı İzlediği Siyaset – DergiPark](https://dergipark.org.tr/en/pub/vakanuvis/article/1413015)\n\n---\n*Topic: Encyclopedia › Society and history › History and archaeology › Other history › Middle East and North Africa › Seljuk and Khwarazmian period (1037 to 1308) › Dynasties, rulers, and events › Rulers and officials*\n\n*Initially written Sep 23, 2026 · Edited: Oct 15, 2026*\n\n*Copyright 2026 EdgeChat AI, a subsidiary of Biostate AI.*\n\nLicense: Edgepedia Community License 1.0, https://www.edgepedia.org/edgepedia/license\n", "same_as": [], "url": "https://www.edgepedia.org/il-arslan", "markdown_url": "https://www.edgepedia.org/il-arslan.md", "license": { "name": "Edgepedia Community License 1.0", "url": "https://www.edgepedia.org/edgepedia/license", "summary": "Free with credit, commercial use included. AI training is open to everyone. For other uses, organizations over USD 100M in revenue or 100M monthly users license separately.", "spdx": "LicenseRef-Edgepedia-Community-1.0" }, "credit": "\"Il-Arslan\", Edgepedia (EdgeChat), https://www.edgepedia.org/il-arslan. Edgepedia Community License 1.0.", "credit_md": "\"[Il-Arslan](https://www.edgepedia.org/il-arslan)\", Edgepedia (EdgeChat), [https://www.edgepedia.org/il-arslan](https://www.edgepedia.org/il-arslan). [Edgepedia Community License 1.0](https://www.edgepedia.org/edgepedia/license).", "credit_html": "\"Il-Arslan\", Edgepedia (EdgeChat), https://www.edgepedia.org/il-arslan. Edgepedia Community License 1.0.", "speakable": "Il-Arslan, fully Abu'l-Fath Il-Arslan, was Khwarazmshah from 1156 to 1172, son of Atsiz, ruling Khwarazm as an independent state under Qara Khitai overlordship." }