McBeath was a 19 years old lance-corporal in the 1/5th Battalion, The Seaforth Highlanders of the British Army during the First World War when the following deed took place for which he was awarded the VC. On 20 November 1917 during the Battle of Cambrai in France, Lance-Corporal McBeath volunteered to deal with a nest of machine-gunners that checked the advance of his unit and which had caused heavy casualties. He moved off alone, armed with a Lewis gun and a revolver. Finding that several other machine-guns were in action, McBeath attacked them with the assistance of a tank and drove the gunners to ground in a deep dug-out. McBeath rushed in after them, shot the first man who opposed him and then drove the remainder of the garrison out of the dug-out. He captured three officers and 30 men. McBeath's award was published in the London Gazette on 11 January 1918, which reads:
Freemasonry
He was Initiated into Freemasonry in Lodge St. Mary's Caledonian Operative, No.339, on 12 July 1919. He did not take all his Masonic degrees in Scotland. After his arrival in Canada, he completed his degrees in Mount Hermon Lodge, No. 7 in which he was Passed on 29 October 1921 and Raised on 18 May 1922.
Canada
After the war, McBeath and his wife moved to Canada, where he joined the British Columbia Provincial Police. On August 12, 1921, he joined the Vancouver Police Department. On October 9, 1922, while walking the beat on Granville and Davie Streets with his partner, Detective R. Quirk, McBeath stopped and arrested a man named Fred Deal for impaired driving. While escorting the prisoner to the nearest call-box, the man pulled a handgun from his pocket and shot both officers; MacBeath's partner survived, but McBeath died almost instantly. He was 23 years old. Fred Deal was arrested later that day and was subsequently sentenced to death. The sentence was reduced to life imprisonment on appeal because Deal had been beaten while in custody. Deal served only 21 years before being released and deported to his native Jacksonville, Florida, where he died a few years later.
Funeral
Robert McBeath was given what was called at the time “the largest official funeral in Vancouver history.”
Posthumously
A Vancouver Police Marine vessel is named the in honour of Robert McBeath, as is a housing development, McBeath Court, in his home town of Kinlochbervie. McBeath is buried in the Masonic Section, Plot 193, Lot 6, of Mountain View Cemetery in Vancouver. The headstone shows his name as "MacBeath", although his surname is spelled "McBeath" on all other documents except the Vancouver coroner's report. The Vancouver Police Department hold a ceremony at his graveside every November 11 at 0900 hrs., where names and branches of service of VPD members, who took their leave, then served in the Canadian Armed Forces, and were KIA overseas are read out. McBeath's Victoria Cross is displayed at the Regimental Museum of Queen's Own Highlanders, Fort George, Highland, near Inverness in Scotland.