 Complete the following phrase:  No new expedition was launched from Western Europe to stop the Turkish advance in the Balkans after this defeat, until the 1440s. England and France soon renewed their war. Wallachia continued its stance against the Ottomans, having stopped another expedition in the next year, 1397, and in 1400 yet another expedition of the Ottomans. The defeat and imprisonment of Sultan Bayezid I by Timur Tamerlane at Ankara in the summer of 1402 opened a period of anarchy in the Ottoman Empire and Mircea cel Batran took advantage of it to organize together with the Kingdom of Hungary a campaign against the Turks. The Hungarians, Poles and Walachians were defeated at the Battle of Varna in 1444, and Constantinople finally 