 Muhammad Haidar sent an army to quell him; when this force was defeated he took the field in person against his nephew but lost a battle against him as well.In 1479 he asked for assistance from Yunus Khan; the two jointly marched against Yarkand but Mirza Aba Bakr defeated them and forced them to retreat.In 1480 Yunus Khan and Muhammad Haidar assembled a larger force and against advanced against Yarkand.