Nov 1925Nejd-Transjordanborder agreement
12 Dec 1925Reza Khan isdeclared Shah
16 Dec 1925Mosul awarded to Iraq
17–19 Dec 1925Saudis captureJeddah & Medina
Jul 1926Chinese Nationalistslaunch Northern Expeditionto reunify China
20 May 1927Anglo-SaudiTreaty of Jeddah