Seven riders plan to trace the historic route of Henry Tudor and ride from Pembroke to Bosworth Field, Leicestershire, in support of the Army Benevolent Fund.
On Sunday 13 July the riders — in full period costume — will set off on a journey across Wales and England.
They will follow in the footsteps taken by Henry Tudor (Henry VII), when he came to challenge and subsequently over throw King Richard III and his army at the Battle of Bosworth in 1485.
Riders will include Major General Sir Evelyn Webb-Carter, controller of the Army Benevolent Fund, and the military historian Professor Richard Holmes, famed for presenting tv programmes War Walks and On the Western Front.
The party will arrive at Bosworth Field on Saturday 19 July, to a reception that will include a freefall display, dinner and a battlefield tour from Prof Holmes.
The Henry Tudor Ride aims to raise over £50,000 through rider sponsorship. For more information about the ride including details of evening receptions and arrival times in each town, visit www.armybenfund.org or call 0845 241 4826.
To sponsor a rider visit www.justgiving.com/henrytudorride