A BBC Radio File on Four programme summarised:http://www.bbc.co.uk/news/uk-18902195

The study by Dr Deirdre MacManus, at The Kings Centre for Military Health Research, found an association between soldiers' experiences in Iraq and Afghanistan, and violent behaviour at home. Soldiers involved in direct combat were twice as likely as others to admit having hit someone at the end of the tour, the research found. A third of the victims were someone in the family - often a wife or girlfriend.

Cultural change needs to be encouraged... so servicemen realise it's not un-macho to put their hands up and say 'I need help'.”

Dr MacManus said: "The association between performing a combat role and being exposed to combat, and subsequent violence on return from deployment, is about two fold. We also saw that soldiers who had seen more than one traumatic event were more likely to report being violent."