Britain's Prince Harry has praised the courage of wounded servicemen and women who are gearing up for a race across Antarctica to the South Pole.

Harry will join a team of four injured British soldiers in the 200-mile Walking With the Wounded charity trek.

Three days ahead of the team's departure from Britain, Harry appeared in London's Trafalgar Square on Thursday with members of the three teams -- from Britain, the U.S. and the Commonwealth -- and spoke of the courage on display going into the challenge.

He said the men and women alongside him "have achieved so much just to get here."

The 29-year-old prince said the trek will prove that even after suffering traumatic events like losing limbs, "you can achieve pretty much anything."