"Covers 1918-1943. Contains information on the development and use of the 4.2-inch mortar; activation, training, and deployment of chemical warfare units; authorization of the HE (high explosives) mission for the 4.2-inch chemical mortars; campaign plans and tactical doctrine; problems encountered and solutions; and an evaluation of operations." - Draft of "Catalog and Index to Historical Manuscripts, 1940-1966," v.3, page 40. [Catalog Materials collection, Archives, Aisle 5A].

"154 pages. Text. Typescript." -- from old catalog card.

Early Development of the 4.2-inch Chemical Mortar -- The Authorization of HE Mission for the 4.2-inch Chemical Mortar -- Chemical Mortar Units-Activation and Deployment Prior to Sicilian Operation -- Tactical Doctrine, Campaign Plans and Training for the Sicilian Operation -- 4.2 Mortar Operations in Sicily -- Problems Encountered in Sicilian Campaign -- Summary and Evaluation.