'Jungle' (i) was a British unrealised plan to send forces to Thrace and Anatolia to support Turkey in the event of a German invasion from Bulgaria (October 1940).

The German high command thought that such an operation could be successfully undertaken by two motorised corps, which could advance into Syria within two months, but the scheme was cancelled by Adolf Hitler, who believed that the strategic risks were too high to make the gamble worthwhile. And throughout this period Turkey maintained a steadfast neutrality, being more concerned with the short-term problems posed by Bulgarian designs on Thrace than by any longer-term push by the Germans.