As it moved into position around Bardia in late December 1940, the 6th Australian Division was still experiencing shortages.
It had only two of its three artillery regiments and only the 2/1st Field Regiment was equipped with the new 25-pdr, which it had received only that month. The 2/2nd Field Regiment was still equipped with twelve 18-pdr and twelve 4.5-inch howitzers.
To make up for this, O'Connor augmented Brigadier Edmund Herring's 6th Australian Division Artillery with part of the XIII Corps artillery:
[Source : Wikipedia]