A second wave of migrants came during the end of the 19th and the beginning of the 20th centuries, when around 30,000 mostly Turkish Hemshin Armenians arrived in the region, along with a few from Persia and Transcaucasia. Some came for economic reasons and were attracted by Russian government, while others were forced to leave due to oppression and genocide by the Ottoman government. Migration peaked from the late 1870s to the late 1910s, coinciding with the Russo-Turkish War of 1877–1878, pogroms against Armenians in Turkey and Baku and the 1915–1920 mass persecution of the Armenian population in Turkey.