Operation Collie was a British naval operation in World War II, from 5–11 July 1945. Its objectives were, firstly, naval bombardment and aerial strikes on Japanese positions in the Nicobar Islands,[1] particularly on Nancowry Island;[2] secondly, providing cover for minesweeping operations in advance of a possible invasion;[1] and thirdly, making carrier raids on Japanese airfields in northern Sumatra.[2] These measures were a prelude for an invasion, Operation Zipper, which was never carried out due to the Surrender of Japan.[3]