BEAUDESERT police are investigating a break-in at Harry's Haunt in the early hours of Tuesday morning.
The Beaudesert RSL Sub Branch military museum, named in honour of Harry "Breker" Morant, is a place of significant importance to local veterans.
Sergeant Steve Ordynski of Beaudesert Police Station said the break-in happened between 3.45 and 4am Tuesday.
"Two people attempted to cut through the side of the shed to gain access but were unsuccessful," he said.
"They then forced open the front roller door and while inside they forced open displays and left with a number of items.
"Police will be reviewing CCTV footage."
Sergeant Ordynski asked anyone with information to please contact Police Link on 131 444.
Beaudesert RSL Sub Branch president Carol Castles said damage to the front roller door and the internal heavy glass door was done to gain access.
"The Police were called and took records of some missing items," she said.
"This behavior is unconscionable, as all the items in this museum have historical significance and all have either been donated or given in perpetuity to be kept in good faith for veterans and their family members that have served our country throughout the many conflicts over centuries now.
"The lack of respect for this museum and its contents does not bode well in our Beaudesert community.
"Fortunately the video footage inside has recorded the intruders.
"Members of the Sub Branch and the wonderful volunteers who give their precious time to this museum are devastated."