 It also provided for the retreat of Ottoman forces from both Danubian Principalities after their prolonged stay following military actions in 1821 (that were carried in response to the Filiki Etaireía in the Greek War of Independence), and Tudor Vladimirescu's uprising.The Ottomans also agreed to cede to Wallachia the control over the Danube ports of Giurgiu, Brăila and Turnu.The convention also tackled the Serbian question