When discussing World War II, familiar battles like the Battle of Normandy, Operation Market Garden in the Netherlands, the Battle of the Bulge, the Battle of Stalingrad in the Soviet Union, and the Battle of Iwo Jima in the Pacific often come to mind. However, the role of Iran in this global conflict is often overlooked. In August 1941, Anglo-Soviet forces launched an invasion of Iran to secure a strategic pathway for sending military aid to the Soviet Union. Subsequently, the US established the Persian Gulf Command to facilitate the delivery of lend-lease assistance to the Soviet Union through the Persian corridor. In 1943, the leaders of the three main Allied nations, including FDR from the USA, Churchill from the UK, and Stalin from the USSR, convened for the Tehran Conference. Located in the province of Gilan, beside the Caspian shores, Lahijan is renowned for its agriculture and forests. Amidst these natural attractions, the WWII Vanguard Museum stands as a unique site dedicated to preserving the history of World War II in Iran. Despite being bombed and occupied by the Soviet Union during the war, Lahijan now hosts the first and only WWII museum in Iran. Established in 2017, the museum was meticulously curated by Caren Omidi, who collected artifacts from various nations, including France, Belgium, the Netherlands, Germany, the US, the Czech Republic, and Italy. Additionally, newspapers and documents were sourced locally in Iran. Since its official opening to the public in May 2021, the museum has become a vital resource for understanding Iran's involvement in World War II.