Fire Emblem Three Houses - Paralogue: The Silver Maiden

Arianrhod, a fortress city located in western Faerghus is overrun with Empire's solders ever since Count Rowe switched sides. Even through the Kingdom army won back Fhirdiad, the Empire has no plans to hand over the fortress to them, and continues attacking the Kingdom. Dimitri thinks winning back Arianrhod will stop those attacks from happening, the only problem through is that the Empire continues bringing reinforcements from the Imperial capital, meaning it would be difficult winning the fortress back with those high numbers. The professor suggests going there right away before any more solders from the Empire show up.

Fun fact, this paralouge was the first one I recorded.