an Entity references as follows:
The Battle of Merv (or Marv) occurred on 2 December 1510 as a result of the Uzbek invasion of Khorasan. It ended with a decisive victory for the Safavid dynasty. The result was that the Safavids regained control of the Khorasan region (north-eastern and east of present Iran, southern parts of present-day Turkmenistan, and western and northern Afghanistan).