In 1916 (1334/35 AH), Abdul Aziz (Ibn Saud) concluded another treaty with Britain which recognized him as the sole ruler of Nejd and Al-Hasa. This agreement gave Abdul Aziz the tacit right to oust the remaining members of the Rashid family. He did so, and by 1918 (1336/37 AH) his authority was extended to reach the outskirts of Hail, the capital of the Rashid. During the next year clashes occurred between the forces of Sharif Hussein of Makkah and a force of the Ikhwan. Nevertheless, Abdul Aziz withheld his troops from attacking the Hijaz. In 1920 (1338/39 AH), he moved further south and consolidated his authority in Asir. The following year, he completed his campaign against the Rashid in Hail which fell under his control. Restraining himself time and time again from proceeding to Hijaz, Abdul Aziz adopted a policy of sitting and waiting.
