"In 1964, Mr Tshombe hired Mr Hoare to take on the communist-backed Simba rebellion.
When the campaign was completed 18 months later, Mr Hoare and his unit of mercenaries - which he nicknamed the "Wild Geese" - were internationally known.
His fervent anti-communist beliefs earned him no fans in many nations, with East German radio regularly describing him as "that mad bloodhound Hoare". This led to him being nicknamed "Mad Mike" - a moniker with which he was delighted."
https://www.bbc.co.uk/news/world-africa-51352075
When the campaign was completed 18 months later, Mr Hoare and his unit of mercenaries - which he nicknamed the "Wild Geese" - were internationally known.
His fervent anti-communist beliefs earned him no fans in many nations, with East German radio regularly describing him as "that mad bloodhound Hoare". This led to him being nicknamed "Mad Mike" - a moniker with which he was delighted."
https://www.bbc.co.uk/news/world-africa-51352075