You seem to have a good handle on this subject. I have been unable to determine the number of troops and guns attached to the 4th Light Anti-Aircraft Regiment. Do you know how many men and guns the regiment would have had in total in June 1944? Do you know how many men and guns if any the HQ Battery would have had in total in June 1944? Do you know how many men and guns the individual Gun Batteries would have had in total in June 1944? I now have two photos of units attached to the Regiment. The one photograph has a total of seventy-five troops. The second photo has a total of forty-four troops, I believe this is the HQ Battery because of the photo having eleven officers and an RSM. I was informed today by the RCA Museum that only about 25% of this Regiment landed on D-Day and that they were a composite unit that had been put together to allow all of the regiments self-propelled guns to be in the initial invasion force. I know the Field Regiments on D-Day contained three Batteries of eight guns each and that all of those guns were 105mm Self Propelled Priests. All or almost all of these unit had these guns taken away in early August and were re-issued towed 25 pounders. If you could answer any of these questions it would be greatly appreciated. Thank you to those of you who have already conveyed photos and information.