Operation Jupiter: Churchill’s Plan to Invade Norway, 1942 (OJ) is an intermediate complexity, two-player wargame simulating the possible events that could have unfolded during the first 30 days of this planned but never run World War II campaign. The British prime minister had intended it as a strategic alternative for the Anglo-American invasion of French North Africa in November 1942 (Operation Torch). Operation Jupiter was envisioned by Churchill (as stated in his memorandum of May 1942) to be a second front (on a small scale) that would gain possession of the northern airfields in Norway and establish a force that would keep open the northern sea route to Russia.