Junior soldiers graduating from the Army Foundation College in Harrogate (Image: Getty Images) Want Stoke-on-Trent news emailed to you direct from our journalists? Sign up to our newsletterInvalid EmailSomething went wrong, please try again later. Subscribe When you subscribe we will use the information you provide to send you these newsletters. Your information will be used in accordance with ourPrivacy Notice. Thank you for subscribingWe have more newslettersShow meSee ourprivacy notice Joining the Armed Forces before reaching the age of 18 does not appear to increase peopleâs risk of post-traumatic stress disorder, new research suggests. Two new studies found little evidence that early recruitment to the services â the British Army, Royal Navy and Royal Air Force â is associated with an adverse impact on long-term mental health.