Sir Ronald Hugh Grierson served in an infantry battalion of a regiment that was created as part of what?
Ronald Grierson: Sir Ronald Hugh Grierson (6 August 1921 – 23 October 2014) was a German-born British banker, businessman, government advisor, and British Army officer. Ronald Grierson:  After service in the Black Watch, attached to the Special Air Service and mentioned in dispatches, during World War II, he became a lieutenant-colonel in the post-war SAS. Black Watch: The Black Watch, 3rd Battalion, Royal Regiment of Scotland (3 SCOTS) is an infantry battalion of the Royal Regiment of Scotland.
i don't know