In 1938, 15th Field Battery was raised, making the Regiment the same composition as in World War I.
At the end of World War II this unit was disbanded.
In 1955, 5th Field Regiment was reformed and was equipped with 25 Pounder Guns.
The battery has close affiliation with the Pine Rivers Shire and Local citizens and was granted the Freedom of the Shire of Pine Rivers on 22 April 1989.
Having served with the M198 Howitzers for two years, 13 Field Battery was once again equipped with the L119 Hamel and oversaw the Army's retirement of the L119.