The Regular Force has three RCHA regiments: RCHA units are the senior units of the Canadian land field force, with a history dating back to the birth of Canada as a nation.

'A' and 'B' Batteries of Garrison Artillery were formed as the first units of Canada's permanent military force in 1871 in Kingston and Quebec City respectively, with a third ('C' Battery) authorized in 1883 and formed in 1887 in Esquimalt.

[2] In addition to the three regiments currently serving, two further regiments have served in the past prior to being disbanded: The Freedom of the City was exercised by the 2nd Regiment, Royal Canadian Horse Artillery in Kingston in 1983; 1996 and May 26, 2012.

[3] The Royal Canadian Horse Artillery badge (1968) by Robert McCausland Limited is a stained glass memorial to 2517 Colonel E. Geoffrey Brooks DSO OBE CD (RMC 1952), who served as the Royal Military College of Canada's staff adjutant 1948–1950 and as Director of Artillery, Royal Canadian Artillery in August 1960.

He is remembered in the Geoffrey Brooks Memorial Essay Competition – 2,000 to 3,000 words on any topic of military history or specific military interest that pertains to The Royal Regiment of Canadian Artillery.