Q. The Treaty of Portsmouth brought an end to a war in 1905 fought between?
Answer: Russia & Japan
Notes: Treaty of Portsmouth ended the Russo-Japanese War in 1905. The treaty was signed on September 5, 1905 at the Portsmouth Naval Shipyard in Kittery, Maine. The treaty was signed by Japanese and Russian diplomats after negotiations from August 6 to August 30. The treaty ended the war that began in 1904. The war was caused by Russian and Japanese expansionism in the Far East. The war contributed to domestic unrest in both countries, which led to the Russian revolution of 1905. U.S. President Theodore Roosevelt was instrumental in the negotiations and won the Nobel Peace Prize for his efforts.