The following missions were flown by Thomas Baum as Jack Dieterle's co-pilot while their unit was on TDY to the IXᵀᴴ Bomber Command:
9 July 1943 — B-24's bomb airfields at Maleme, Crete, and Comiso and Taormina, Sicily. P-40's escort bombers over Castelvetrano, and Milo Airfields. This pre-invasion air bombardment of Sicily provides air superiority over the enemy. The 389ᵀᴴ was attached to the IXᵀᴴ Bomber Command.
11 July 1943 — B-24's hit airfields at Vibo Valentia, Sicily and Reggio di Calabria, Italy. P-40's escort bombers and provide beach cover as invasion forces push inland in Sicily. The 389ᵀᴴ was attached to the IXᵀᴴ Bomber Command.
12 July 1943 — In Italy, B-24's attack the harbor, ferry slip, and marshaling yard at Reggio di Calabria, and the ferry slip and railroad yards at Villa San Giovanni. The 389ᵀᴴ was attached to the IXᵀᴴ Bomber Command.
14 July 1943 — In Sicily, B-24's and Royal Air Force (RAF) heavy bombers hit railroad, marshaling yard, harbor, and oil storage facilities at Messina. Jack Dieterle recalled that they were trying interdict the German retreat from Sicily and that it was the heaviest AA bombardment that he had ever seen. His plane, the Little Gramper brought up the rear of the mission. They were attached to the IXᵀᴴ Bomber Command.
16 July 1943 — B-24's attack Bari Airfield, Italy; enemy fighters attack persistently and 3 B-24's are shot down; they claim 11 fighters destroyed in combat. The 389ᵀᴴ was attached to the IXᵀᴴ Bomber Command.