Complex sentence: The Mafeking Cadet Corps was a group of boy cadets during the Siege of Mafeking in South Africa in 1899-1900, and is regarded as one of the inspirations in Robert Baden-Powell's creation of the Scout movement a few years later.
Split into simpler sentences: The Mafeking Cadet Corps was a group of boy cadets during the Siege of Mafeking in South Africa. They are sometimes seen as forerunners of the Scouts, because they were one of Robert Baden-Powell's inspirations in creating of the Scout movement a few years later.