One day, in an alternate GuP universe

Many schools are taking part in Koushiki Senshadou, where the rulebook is slim and the dangers are real due to live ammunition and military strategy. Currently, the Battle of Kuromorimine is ongoing. Pravda is marching into the Kuromorimine residence in Berlin with a combined number of 147 tanks. Following schools are taking part, and you get to join one:

Kuromorimine Girls' Academy - Objective: defense/evacuation Pravda High School - Objective: destroy the Kuromorimine residence Oarai Girls' Academy - Objective: victory by rising their flag over the Reichstag