The HALO Trust is a humanitarian non-government organisation which primarily works to clear landmines and other explosive devices left behind by conflicts. With over 10,000 staff worldwide, HALO has operations in 28 countries. Its largest operation is in Afghanistan, where the organization continues to operate under the Taliban regime that took power in August 2021.

Colin Campbell Mitchell was a British Army soldier and politician. He became a public figure in 1967 as the commanding officer of the 1st Battalion of the Argyll and Sutherland Highlanders. Forces under his command reoccupied the Crater district of Aden which had been taken over by local police mutineers in what became known as "the last battle of the British empire". The reoccupation and subsequent control of the Crater were controversial and Mitchell resigned his army commission in 1968. Subsequently, he became a Conservative Member of Parliament and served one term from 1970 to February 1974. After participation in a failed business venture he subsequently worked as a security and military consultant. In 1989 Mitchell took a leading role in the Halo Trust, a not-for-profit organisation undertaking mine clearance in former war zones.