In 1907, McCurdy joined the United States Army. Assigned to Fort Leavenworth, McCurdy was a machine gun operator and was trained to use nitroglycerin for demolition purposes (the extent of this training was likely minimal). He was honorably discharged from the Quartermaster Corps on November 7, 1910. McCurdy then made his way to St. Joseph, Kansas where he met with an Army friend. On November 19, McCurdy and his friend were arrested for possessing burglary paraphernalia (chisels, hacksaws, funnels for nitroglycerin and gunpowder and money sacks). The "St. Joseph Gazette" reported that during their arraignment, McCurdy and his friend told the judge the tools were not intended for burglary purposes but were tools they needed to work on a foot-operated machine gun they were inventing. In January 1911, a jury found McCurdy not guilty. After his release from county jail, McCurdy's short lived career as a bank and train robber began. His robberies were generally bungled affairs due to McCurdy's ineptitude.