The Royal Marines football team has been raising money for charity by cycling and running the distance around the world.
The aim of the challenge is raise £25,000 during the challenge, which involves covering 25,000 miles.
After three weeks, the Royal Marines are on course for their mile target after completing more than 10,000 miles.
The NHS and the Royal Marines Charity are two organisations which the team are raising money.
They are not the only military sporting affiliation to try a distance challenge in recent weeks, as the RAF Police Rugby team completed more than 70,000 miles in their effort to raise money for charity.