What were the Mongols advantages over other warrior cultures?

The correct answer to this open question is the following.

Although there are no options attached we can say the following.

What were the Mongols advantages over other warrior cultures?

The Mongols were fierce warriors extremely well-trained in the arts of war. The Mongols developed the kind of military discipline and strategy to defeat their enemies.

They were not a big army compared to other empires. But they were very smart and were experts riders and archers. Since Mongols were children they were trained in the art of war and as soon as they could carry a bow, they practiced war activities.

These skills made it possible to conquer places such as Russia, during the winter!

And as we write above, the army was not as big as other armies. We are talking about 100 to 150,000 soldiers.