The Battle of Kronstadt

The waters around the base were frozen solid, preventing supplies and reinforcements from reaching the naval base by sea. Kronstadt never did respond to trotsky's ultimatum. Even if their brother comrades in kronstadt were being led astray, there was a very short window to talk them down. So they concluded that however much it might pain them, deploying overwhelming force to crush the rebels might be necessary. It became necessary on march seventh.