Toghon (died 1301) was the ninth son of Kublai Khan, founder of the Yuan dynasty. He was a commander of the Mongol forces in the Mongol invasions of Vietnam.
He was granted the title Prince of Zhennan (é®åÂÂçÂÂ, , "Prince of Suppressing the South") and moved his household to Ezhou in 1284.
In 1285, he led the Mongol armies sent to conquer Champa. He demanded from ÃÂại Viá»Ât (now modern Vietnam) a route to Champa, which would trap the Champan army from both north and south, but it was rejected by retired emperor Trần Thánh Tông, who was the de facto ruler of ÃÂại Viá»Ât. As a result, Toghon led an invasion of ÃÂại Viá»Ât under orders from Kublai Khan. At first he won several victories and captured ThÃÂng Long, the capital of ÃÂại Viá»Ât. Trần Thánh Tông had to offer princess An Tð to him to slow down the pace of the Mongol army. Later he ordered a withdrawal back to China, blaming the weather and disease in ÃÂại Viá»Ât. His forces were attacked and defeated by Trần Hðng ÃÂạo during their retreat.
In 1287, he invaded Vietnam again. The Mongol navy was overwhelmed by Trần dynasty in Bạch ÃÂằng river, and he retreated. This ashamed his father who no longer wished to see him again. He moved to Yangzhou in 1291, where he died 10 years later.