The wooden bridge over Daugava is seen blown up. Actually, this bridge stayed almost intact.
Latvian army is seen moving across Daugava in boats. Actually, in that year and time, the Daugava river was already frozen.
Character Martins rings a bell of the church to signal others about successful attack. Actually, all bells from churches where moved to Russia during the First World War. The only church bell left, was in St. Peter's church, and it was used as a fire alarm.
When Martins plans Latvian counter attack, he finds out that Latvian army has no artillery. Actually, Latvian army had several artillery units, and also artillery support from allied ships.
There's a scene where General Pavel Bermondt-Avalov engraves a message in a windowsill of a church in Tornkalns. Actually, he never left his headquarters in Jelgava the whole time of the battle.
Map in the government's meeting hall wall shows Finland missing Petsamo and Karelia peninsula, both lost in Paris Peace treaty after Second World War.