Backstage at British Military Tournament
5 December 2013 Last updated at 09:57 GMT
The annual British Military tournament takes place this weekend, in which audiences will see the traditional field gun challenge, commandos abseiling from a helicopter and a submarine emerging through the floor.
The tournament, which began in 1880, was scrapped in 1999 for a few years but was brought back in 2009 to raise money for charities supporting British service personnel.
Graham Satchell went behind the scenes at rehearsals in Earl's Court.