In March 1553 Suleiman urged Isabella to return to Hungary. Péter Petrovics rose against Ferdinand, and an assembly of the Székely people declared their loyalty to John Sigismund. However, both uprisings were crushed before the end of September. Deciding in April 1554 that Hungary should be restored to John Sigismund, Suleiman allowed Péter Petrovics to take control of two fortresses in Banat. Henry II of France, engaged in war against the Habsburgs, also urged Isabella to return to Hungary, promising one of his daughters in marriage to John Sigismund.