Over the years regiments have been amalgamated. The Royal Berkshire Regiment, in which a lot of Abingdon men served, eventually became The Rifles – along with several other county named regiments.
The museum that holds the collections for two of those regiments: the Royal Berkshire Regiment, and Wiltshire Regiment, is in Salisbury in Wiltshire, and is called The Wardrobe.
There are probably more Wiltshire, than Berkshire, exhibits on display but given the location within view of Salisbury Cathedral that is understandable.
Just inside the entrance there are some army banners. Next to one Royal Berkshire Regiment banner a label says “Following the Opium War of 1841, the 49th Regiment (later the Royal Berkshire) was authorised to wear the Dragon and the word ‘China’ emblazoned with its colours.”
Not on display, but viewable on their web site, the museum have some pictures of Abingdon soldiers, and people, that can be ordered. There are some of of an early “Abingdon contingent assembling on Abingdon Railway station on route to their war time station after the start of the 1st World War.”