Foot Guards

(in Britain) an infantry unit forming part of the ceremonial guard of the monarch.

Origin of Foot Guards

First recorded in 1665–75

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

The Duke of Ormond has got his regiment of foot-guards, I know not who has the rest.
The Journal to Stella|Jonathan Swift
The Brigade of Guards—the infantry of the household troops—comprises the five regiments of foot-guards.
The New Gresham Encyclopedia. Vol. 1 Part 2|Various
There are the body-guards, the foot-guards, the horse-guards, and other such troops.
The Road to Paris|Robert Neilson Stephens
There is also the night watchman, who is an ex-corporal of the Foot-guards, and whose character is of the best.
Mrs. Vanderstein's jewels|Mrs. Charles Bryce

In the house where I live six of the Prussian foot-guards were quartered.
Frederic Shoberl Narrative of the Most Remarkable Events Which Occurred In and Near Leipzig|Frederic Shoberl (1775-1853)