[2] In 1939, as World War II loomed, the unit, by then known as the "1st (Halifax) Coast Brigade, RCA", was again called to active service.

The unit was re-designated as the "1st (Halifax) Heavy Anti-Aircraft Regiment, RCA" in 1942 and armed with British-made QF 3.7 inch AA guns.

[2] After the end of World War II, in 1955, the unit was re-armed with American-made 90 mm guns and re-designated as a Medium Anti-Aircraft Regiment.

Over the course of the 20th century the Siege Battery was attached and detached until on April 1, 1946, it was amalgamated to the 1st (Reserve) (Halifax) Coast Brigade, RCA.

The East Coast is unfortunately hit harder than other parts of Canada in terms of natural disasters, being prone to hurricanes and blizzards.

[3] In 2012 Regimental Headquarters (RHQ) and 51 Battery, moved from the Halifax Armoury to their new facility at 73 Hobson Lake Drive.

Housing 1st (Halifax-Dartmouth) Field Artillery Regiment, and The Princess Louise Fusiliers this large, urban, Romanesque Revival drill hall, was built for the active militia, of red rough faced brick