Analysis of information sources in references of the Wikipedia article "மங்கோலியர்களின் சின் வம்சப் படையெடுப்பு" in Tamil language version.
In A.D. 1232 an army of 30,000 Mongol warriors invaded the Chinese city of Kai-fung-fu, where the Chinese fought back with fire arrows ... Mongol leaders learned from their enemies and found ways to make fire arrows even more deadly as their invasion spread toward Europe. On Christmas Day 1241 Mongol troops used fire arrows to capture the city of Budapest in Hungary, and in 1258 to capture the city of Baghdad in what is now Iraq.
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