| Partof: | Second Northern War / Russo-Swedish War (1656–1658) |
| Conflict: | Storm of Kokenhusen |
| Place: | Kokenhusen |
| Date: | 14 August 1656 |
| Result: | Russian victory |
| Combatant1: | Swedish Empire |
| Commander1: | Magnus Gabriel De la Gardie |
| Commander2: | Aleksey Mikhailovich |
| Strength1: | 300[1] |
| Strength2: | 2,500[2] |
| Casualties1: | 300 |
| Casualties2: | 67 killed 430 wounded[3] |
| Territory: | Russia gains control of the Daugava River |
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)
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" (ru|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.