Grayson Carlisle, commander of the rebel Gray Death Legion, must use all his knowledge and military experience to repel the landing of the armed forces of the Federated Commonwealth. In the end, what happened was partly his fault. But the forces are too unequal. Commander-in-Chief Brandel Gareth is calm, the troops entrusted to him are quite enough to break the resistance of the rebels. Operation Excalibur takes place on the planet Glengarry.