The Russian-Japanese War was fought from 1904 till 1905 between the Russian and Japanese Empires about territorial disputes over Manchuria. This had been an ongoing conflict for years but it was not until Russia gained control over Port Arthur, a naval port located in the Liaodong Peninsula, Japan attacked and officially declared war.
The war ended with the signing of the Treaty of Portsmouth proposed by President Theodore Roosevelt. It acknowledged Russia would withdraw its power out of Asia and Japan regain control of Port Arthur.
France and Russia had formed an alliance before World War 1. Due to this, French citizens feared a conscription crisis. France would later enter the war with Russia to fight a double front war against Germany.
“The Treaty of Portsmouth and the Russo-Japanese War, 1904–1905 .” U.S. Department of State, U.S. Department of State, history.state.gov/milestones/1899-1913/portsmouth-treaty
“Franco-Russian Alliance.” Wikipedia, Wikimedia Foundation, 16 June 2019, en.wikipedia.org/wiki/Franco-Russian Alliance.