Complex sentence: In 1828, the Russians declared Russo-Turkish War, 1828-1829 and in the Treaty of Adrianople, Akhalkalak and Akhaltsikhe exchanged to Russia.
Split into simpler sentences: In 1828, the Russians declared Russo-Turkish War, 1828-1829. In the Treaty of Adrianople, Akhalkalak and Akhaltsikhe exchanged to Russia.