The US Army is investigating a trip to Poland made by the 101st Combat Aviation Brigade during which several members of the group, including senior officers, made a trip to an 'off limits' strip club and saw an executive officer go missing for two days.

Lieutenant Colonel Matthew Fix, who was commanding the 40-strong 'No Mercy' 1st Battalion Army Apache helicopter unit at the time of the incident, is now set to resign in the aftermath of the debacle.