📅 26 June 1919
Karakhan’s note announced the Soviet rejection of tsarist privileges in Iran. It became a reference point for the later friendship treaty.
📅 1 October 1927
Iran and the USSR signed a guarantee and neutrality treaty. Its protocols preserved the 1921 treaty’s intervention exception, qualifying the promise against introducing troops into the other state.
📅 1 October 1927
A separate Soviet-Iranian agreement established joint exploitation of southern Caspian fisheries under a 25-year concession. Economic cooperation raised questions of control over Iranian resources.
📅 31 May 1924
The Sino-Soviet agreement restored diplomatic relations and declared that tsarist-era treaties affecting Chinese sovereignty would be reviewed or annulled. It addressed the Chinese Eastern Railway and...
📅 20 January 1925
The USSR and Japan signed the Basic Convention establishing diplomatic relations and agreeing on the evacuation of Japanese troops from northern Sakhalin. The settlement restored Soviet sovereignty...
