The Sui–Ly War was a military conflict between the Chinese Sui dynasty and Vietnamese Ly dynasty in 602. In 601, Ly Phat Tu was summoned to attend the Chinese court. However, he delayed the attendance and eventually rebelled in 602, even though he had recognized Sui authority in 595. He concentrated his military forces at the Ly capital Co Loa and at Long Bien. In 602, General Liu Fang led his army in the invasion of Ly.