Even though the Mongols had all this great strategy, their equipment helped to further ensure victory. Some of the equipment the Mongols used were their silk under-armor, bows, swords and spears.
The Mongols had a very advanced armor system. Under all their standard armor they would wear silk, but not because it kept them warm and comfortable. The reason Mongols wore silk was because of the protection it offered. Silk is very strong and would not tear, so if an arrow broke through the armor, the silk would slow down the arrow and also keep any poison out of the bloodstream. If the arrow was stuck in a Mongol's body, he could pull the silk on either side of the arrow to pop it back out.
The Mongol bow was unbelievably powerful. Though it was not as large and long as the celebrated Medieval English longbow, it was more powerful. The draw weight of an English longbow averaged around 200 pounds, but the Mongol bow averaged around 266 pounds. An English longbow could shoot at distances up to 750 yards but the Mongol bow can hit its target from 900 yards away. And if the archer is well trained he could reach distances beyond that, even while galloping on horseback. The Mongols usually had a second bow for short range attacks and two different quivers with different arrow types for different situations.
The Mongol spearmen and swordsmen were not as specialized as their mounted units (which the Mongols preferred) but they still had them in their army and they were still used effectively when the situation called for it.
Now you have all you need for an army but who was it that united the contentious Mongols into one empire? Oh that’s right, Genghis Khan. He helped unite the Mongols, a hard task for anyone. The Mongol tribes always fought against each other over food and land because the steppes on which they lived were not filled with resources. With sheer force and persuasion Genghis Khan managed to win a group of diverse tribal people to his side, and by political as well as military means he overcame all resistance against his grand idea of a Mongol empire. Genghis Khan had managed to unite the Mongol people under his leadership which is how all the strategy and equipment came to be developed.
So, overall, it was the quality of the Mongol leader, their equipment and strategy that led the Mongols to a great many victories, and eventually to dominance over the largest land empire ever seen. The Mongol strategy affected war not just in their time but also, through duplication, in our world today.