This action set in motion the first major western thrust by the Mongols.
A famine
A drought
A prophesy
A treaty
An execution
An execution. The thrust began when the Khwarezmian Shah Muhammad executed Mongol envoys in 1218 in the Transoxiana, an area of Central Asia between the Oxus (Amu Darya) and Jaxartes (Syr Darya) rivers that today includes Uzbekistan, Tajikistan and parts of Kazakhstan.