tatar conquest, 1643-1644

"When China is invaded by the Huns, Mulan decides that she must disguise herself as a male soldier to fight in place of her ill father, who has been called up for war"--OCLC.

"When Captain Shang is mortally wounded by Shan Yu in battle, Mulan must travel to the Underworld, Diyu, in order to save him from certain death. But King Yama, the ruler of Diyu, is not willing to give Shang up easily. With the help of Shang's great lion guardian ShiShi, Mulan must traverse Diyu to find Shang's spirit, face harrowing obstacles, and leave by sunrise--or become King Yama's prisoner forever. Moreover, Mulan is still disguised as the soldier called Ping, wrestling with the decision to reveal her true identity to her closest friend"--Amazon.

Mulan, a misfit in tradition-bound Chinese society, finds her family's honor and the fate of her Emperor and country in her hands after she disguises herself as a soldier in order to take her father's place in the Imperial Army to fight the invading Huns.