Conditions where a lot different from which it is know, There where restrictions what the warriors of the Mongol Empire could and could not do. Furthermore with These restrictions, the Mongol Empire was respected by there home country, also they where able to conquer most Tribes and countries.
For the most part Genghis Khan promised the protection of his country and its people. For the most part of the 12 century The Mongols only lost a few battles. Furthermore the battles they won against significantly larger opposing armies.
Some more conditions different was the food. Food in Mongolia was divided into to parts, the Whites and the reds. White foods where responsible of the dairy products, also they where the main food