August 21 in Russia: 1808 — One of the key battles of the Russo-Swedish War of 1808-1809 took place near Karstula, between the #Russian imperial army led by General E. I. Vlastov and the Swedish troops commanded by Henrik Otto von Fiandt. 1825 — A museum of antiquities was opened in #Odessa. 1828 — A battle occurred at the fortress of Akhaltsikhe between the Russian troops under General Paskevich and the Turkish army of Kios-Magomet-Pasha.