Can you help Jan Scanlan?

I am researching WW1 N.Z.F.A. for family history research.
I have received the NZDF Archives material for my Grandfather who was with the 28th Division and a gunner with the 13th Battery. He was in the field in 1918 in France.
I would like to know where this Battery was situated and what it was involved in?

• He started out at Etaples – General base camp.
• From there he went to 22 Cps R.C.??? 14 2 1918
• Then to RCNZ Div Wg. 15.2.18
• Marched out to Division. Field. 22.3.18
• Posted to 13th Battery. ?? Attached to General Base Depot?where ? 14.11.18
• Rejoined 13th Battery 12.11.18

I would appreciate some help with this information.
Thanks, Mrs Jan Scanlan - mjscanlan@orcon.net.nz