Why is Tongjiang called "the hometown of red"?

During the Second Revolutionary Civil War, the Red Fourth Front Army established the second largest revolutionary base area in Jiangsu, Sichuan and Shaanxi with Tongjiang as the center, and Nuojiang Town, the county seat, was the capital of the Sichuan-Shaanxi Soviet Area. The headquarters of the Red Fourth Army and the General Political Department are stationed here. 1982 65438+February 18, officially opened as a military history exhibition hall in Sichuan-Shaanxi revolutionary base area to commemorate the 50th anniversary of the Red Fourth Front Army's entry into Sichuan.