[1] The regiment was progressively expanded and by the end of the war had batteries all over the lower North Island.

In 1941, the regiment was expanded to include the coastal artillery batteries which covered other ports in the lower North Island.

After the war it was decided that only the defences at Wellington should be kept in an operational state by a small peacetime garrison.

The armament and equipment were placed on a care and maintenance basis, while the regiment was reduced to a cadre.

The regiment eventually dropped to a single quartermaster sergeant, but continued to exist on paper until it was formally disbanded in 1967.