After Russia occupied the Danubian Principalities, Henry convinced Frederick and Archduchess Maria Theresa of Austria that the balance of power would be maintained by a tripartite division of the Polish–Lithuanian Commonwealth instead of Russia taking land from the Ottomans. Under pressure from Prussia, which for a long time wanted to annex the northern Polish province of Royal Prussia, the three powers agreed on the First Partition of Poland. This was in light of the possible Austrian-Ottoman -Bar confederation alliance with only token objections from Austria, which would have instead preferred to receive more Ottoman territories in the Balkans, a region which for a long time had been coveted by the Habsburgs, including Bukovina. The Russians also withdrew from Moldavia and Wallachia away from the Austrian border.