History of East Asia
Mongolian Invasions of Japan
The Yuan Chinese under Mongol Kublai Khan twice invaded Japan... and twice they were repelled miraculously. It wasn't the fearless samurai who beat the Mongolian Emperor, but Nature itself.
Internet East Asian History Sourcebook
Clearinghouse of information about the history and culture of China, Japan, and Korea. Includes links to maps, artwork, and religious texts, as well.