The Japan-Korea Treaty of 1905 was an agreement that established Korea as a protectorate of Japan following the Russo-Japanese War. This treaty marked a significant shift in Korea's sovereignty, as Japan gained control over Korean foreign affairs while allowing the Korean government to maintain some internal autonomy. The treaty was signed on November 17, 1905, under pressure from Japan, which had emerged as a dominant power in East Asia. It laid the groundwork for further Japanese influence in Korea, ultimately leading to the formal annexation of Korea in 1910, which lasted until the end of World War II.