1657 1658 The Storm of Kokenhusen by the Russian Army under Tsar Alexei Mikhailovich was one of the first events of the Russo-Swedish War (1656–1658), a theater of the Second Northern War.

On 14 August 1656 Russian troops stormed and captured the well-fortified town of Kokenhusen (Koknese) in Swedish Livonia (present-day Latvia)[4] According to the Tsar, this town “was very strong, had a deep moat, like a small brother of the Kremlin's moat, and its fortress is like a son of Smolensk's fortress”.

Tsar also gave city new name, "Tsarevich-Dmitriev" (Russian: Царевич-Дмитриев) in honor of his infant son, Tsarevich Dmitry Alexeyevich of Russia, who had died in 1649.

This new name didn't last since in 1681 city was returned to Swedish Livonia.

[4] After capturing Kokenhusen, Russia gained control of the Daugava River and the way to Riga was opened.