00:02By the late 13th century, European armies were no longer the same.
00:07They built stronger castles, learned to fight on horseback and improved their bows and armour.
00:14But most importantly, they learned unity.
00:18The fear of the Mongols had forced rival kingdoms like Poland, Hungary and the Holy Roman Empire to stand together.
00:27Religion also played its role.
00:31The church declared that defending Christendom from the Tatar invaders was a holy duty.
00:37Knights from across the continent began training, praying and preparing for the day when the Mongols would return.
00:45And return they did.
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