The K-Verband (German Kleinkampfverbände der Kriegsmarine, "small battle units") was a World War II German naval unit that operated a mixture of midget submarines and explosive speed boats.^[1] It was formed in April 1944^[1] and operated until 26 April 1945.^[2]

The miniature submarines were a mix of one and two-man craft. The Linsen explosive motorboats were operated in units of three with two boats carrying 660-800 lb of explosives and a third tasked with remotely controlling them during their final attack run.^[1]