Hello Ade, welcome to the forum, it`s always good to hear from new members from across the pond.
I`ve done some quick research on the units you mention but it does not appear that they were in 6th Corps unless it was late in the war. The 1278th &158th were under the 1128th Engineer Combat Group
and supported V Corps in Normandy, & VIII Corps in Belgium fighting in the Battle of the Bulge.
During World War II, the 5th Engineer Regiment formed several new units including the 1278th Engineer Battalion. The 1278th was redesignated as the 5th Engineer Battalion in January 1945.
1278th Engineer Combat Battalion
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38th Eng (Gen Serv)
Sailing from Dakar, F.W.A. the 38th Engineer Regiment arrived in England in January 1944. In England the unit was changed to 38th Engineer General Service Regiment. The unit constructed camps and participated in the intensive pre-invasion training (for D-Day). Attached to the 1st Engineer Special Brigade, the regiment was in the invasion forces on the coast of France. In France the unit has built roads, cleared mines, unloaded ships, constructed railroads, bridges and craneways. Large assignments were the development and operation of the Vologne Staging Area and the Red Horse Assembly Area and the construction of Camps Twenty Grand and Old Gold.
http://www.6thcorpsc...indpost&p=15794
http://home.earthlin...daalex/38th.htm
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505th Light Pontoon Co.
Everything you would want to know about the 505th can be found on their website. The history documents tell of their training in your area.
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164th Eng nothing on this unit yet , but have been in the 1128th ECG at times.
28th Cav Recon Sqd (Mech) nothing on this unit yet.
41st & 67th Evac Hosp nothing on these units yet, but found some mention of them in Belgium during BOB.