The Mongol army in the 13th century was composed of skilled horsemen and agile soldiers. They utilized advanced battle tactics like using spies to gather intelligence, catapulting projectiles over walls, damming rivers to flood towns, and feigned retreats. The Mongols also had effective weapons at their disposal such as bows and arrows, sabers for close combat, trebuchets for breaching walls, and triple-bow siege crossbows. Through superior tactics and weaponry, the Mongol army was able to dominate militarily despite their small size.