The Livonian Brothers of the Sword were absorbed by the Teutonic Knights in 1237 after the former had suffered a devastating defeat in the Battle of Saule. The Livonian branch subsequently became known as the Livonian Order. Attempts to expand into Rus' failed when the knights suffered a major defeat in 1242 in the Battle of the Ice at the hands of Prince Alexander Nevsky of Novgorod. Over the next decades the Order focused on the subjugation of the Curonians and Semigallians. In 1260 it suffered a disastrous defeat in the Battle of Durbe against Samogitians, which inspired rebellions throughout Prussia and Livonia. After the Teutonic Knights won a crucial victory in the Siege of Königsberg from 1262 to 1265, the war had reached a turning point. The Curonians were finally subjugated in 1267 and the Semigallians in 1290. The Order suppressed a major Estonian rebellion in 1343–1345, and in 1346 purchased the Duchy of Estonia from Denmark.