During World War II, destroyers were administratively grouped into one of several destroyer flotillas. These ships could also function as flagships of torpedo boat flotillas. Some light cruisers were built specifically to act as the leaders of flotillas of destroyers. They are organised into flotillas spread across the three main fleets. The new governors repaired to Santo Domingo to prepare the expeditionary flotillas. The newly named Naval Force was thereafter organized into two flotillas and a logistics battalion. The Polish Navy is organized into 2 separate Flotillas and a Naval Air Brigade. The Cossack flotillas numbered 80 to 100 boats. Twenty-four vessels were ordered, in three eight ship flotillas, built between 1937 and 1942. The two navy flotillas were commanded by Lt. A similar arrangement applied to the Flag Officer, Flotillas, Mediterranean Fleet. There also existed some thirty minor-waterways combat flotillas. Two nine-ship flotillas were built. Smaller landing craft were grouped into one of several landing craft flotillas. Both the North Korean and South Korean flotillas took casualties from the action.