The Honourable Artillery Company's 11th annual open evening was a rare chance for the public to glimpse behind the walls of Finsbury Barracks.
Hidden away near the heart of London’s financial district, the HAC is Britain's oldest TA Unit, incorporated by a Royal Charter of Henry VIII on 25th August 1537.
Up to 4,000 visitors attended the evening to see first-hand how different units operate and the types of weaponry used.
The public were also able to learn about the work of regular and reservist soldiers.
For Lt Col Mark Wood, the open evening was an opportunity to convince those considering joining the army:
"It's just a great opportunity for the HAC and the wider army, both regular and reserve, to open its doors and let the public see what it's all about.
"And of course, do a little bit of recruiting if there's people out there who want to serve their country and are interested in what the opportunities with the army offer."