The Royal Navy, British Army and Royal Air Force are in action in the annual Inter Services T20 triangular competition at Lord's.
Competition is set to be fierce again this year, after the Royal Air Force came away with last year's trophy on a rain hit day at the Home of Cricket.
The tournament is being held in support of the Combat Stress (opens in a new window) campaign, with sponsorship revenue, corporate donations, programme sales and a collection on the day all benefitting the charity.
MCC will be providing live ball-by-ball commentary throughout the day which will be available online.
Last year's winning captain, the Royal Air Force's Flight Lieutenant Matt Compton, described the importance of the day at Lord's to cricket in the Services.
He said: "The Twenty20 tournament at Lord’s has provided us with a huge stage to promote cricket in the Services but more importantly provide a focus to highlight the considerable efforts of the Armed Forces on operations worldwide.
"It takes considerable efforts from the tournament management, sponsors, Lord’s staff and officials to ensure that everything is in place to enable the players to perform.
"My personal thanks to all who make Service cricket flourish at the Home of Cricket."
Order of Play
Match 1 - 10.00am: - Royal Navy v The Army
Match 2 - 1.15pm: - Royal Air Force v Losers (match 1)
Match 3 - 4.30pm: - Royal Air Force v Winners (match 1)