Signing of the Soviet–Latvian Mutual Assistance Treaty — by Minister of Foreign Affairs of the USSR Vyacheslav Molotov. Standing behind him are (from left to right): the Plenipotentiary of the USSR in Latvia Ivan Zotov, Secretary of the VKP(b) Joseph Stalin, Minister of Foreign Affairs of Latvia Vilhelms Munters, Ambassador of Latvia in the USSR Fricis Kociņš and first Deputy of Foreign Affairs Vladimir Potyomkin
Photo Credit: By Mikhail Mikhaylovich Kalashnikov - Победа. Фотодокументы, Public Domain, https://commons.wikimedia.org/w/index.php?curid=77823049