1080 Chief Da'i Abd al-Malik ibn Attash revolts. 1090 Hassan Sabbah seizes the Alamut Castle. ? First siege of Alamut by the local emir Yurun-Tash is defeated. 1091-1092 Husayn Qa'ini begins his activities in Quhistan. 1092 Sultan Malikshah sends armies against Alamut and Quhistan. Both expeditions failed. 14 October 1092 Nizam al-Mulk is assassinated. November 1092 Sultan Malikshah dies. All anti-Nizari military actions are abandoned. 1092–1105 Seljuk civil war. The Nizaris expanded their positions into many places such as Fars, Arrajan, Kirman, and Iraq 1093 The Ismailis defeat the Sunnis of Rayy commanded by Za'farani in Taliqan November 1096 (or 1102) Isma'ili Kiya Buzurg Ummid captures Lambsar Castle. 1095 Nizari–Musta'li schism. Fatimid Caliphate begins to decline. 1095 Ismailis aquire Takrit. 1100 Ismailis acquire Gerdkuh. 1100 da'i Ahmad ibn Abd al-Malik captures Shahdiz near the Seljuk capital. 1101 Barkiyaruq reached an agreement with Sanjar to eliminate all Nizaris in Western Persia and Khurasan. 1105-1107 Muahammad Tapar begins a campaign against the Nizaris 1107 Shahdiz is captured and demolished. 1106-1109 Campaign against Rudbar devastates the area but fails to capture Alamut. April 1118 Sieges of Lambsar and Alamut are abandoned after Muhammad Tapar's death. 1120 Nizari-Seljuk conflicts reach a stalemate 1126 The Nizaris lost Arrajan. 1129 Beginning of the long-lasting Nizari-Qazvini feud. 1132 The Nizaris enter Jabal Bahra' in Syria.