Graves’ disease is the most common cause of hyperthyroidism. It leads to long-term impairments in quality of life and has a 40% higher mortality rate compared with the general population. We know surprisingly little about the causes of Graves’ disease. One possible trigger is stressful life events; however, the relationship is yet to be proven. This study will assess whether stressful life events, specifically military deployment, are associated with Graves’ disease.