On entering the commander's office, Lieutenant Edlin took a grenade, pulled the pin, and held the grenade to the commander's stomach, forcing him to surrender the fort, along with four 280 mm guns, supporting small-arms positions, pillboxes, and approximately 800 enemy soldiers.
When Lieutenant Edlin entered the commander's office, he used a grenade to threaten the commander, leading to his surrender of the fort, including four 280 mm guns, small-arms positions, pillboxes, and around 800 enemy soldiers.