A famed military commander of the Ming Dynasty in the final years before it was toppled by the Manchurians, Yuan Chonghuan excelled in the use of artillery and brilliantly incorporated Western tactics into his battles. Despite being vastly outnumbered in the 1626 Battle of Ningyuan, his forces defeated those of Manchurian general Nurhaci. Still, rumors that he had collaborated with the enemy spread after he repelled an attack on Beijing in 1629, and he was executed. Who was behind the rumors? Discuss
Source: The Free Dictionary