The Sino-Japanese Joint Defence Agreement was a series of secret military pacts between the Republic of China and the Empire of Japan, signed in May 1918. Drawn up following China's entry into the First World War on the part of the Allied Powers, the agreements, which were concluded in secrecy, granted Japan numerous military privileges within Chinese territory along the Sino-Russian border. The content of agreements were leaked to the press at an early stage, sparking a widespread protest movement by Chinese students in Japan and across China. The agreements were officially terminated in January 1921, their continuance made untenable by Chinese public opinion.