This study attempts to map the incidence and types of musculoskeletal injury during officer training. Officer cadets from three training schools (N = 321) were monitored through a 1-year training course. A total of 278 injuries were sustained by 194 of the 321 cadets (60%). The incidence was highest during an introductory 5- or 6-week period of intensive basic training. During this period, rates at various training schools ranged from 26.7 to 45.5 injuries per 100 cadet-months, which was five to nine times higher than during the rest of the year. The most common types of injury were overuse knee injuries, periostitis or compartment syndromes, Achilles tendinitis, and sprains of joint capsules or ligaments. Women and older cadets sustained more injuries than their respective male (p = 0.02) or younger (p = 0.02) counterparts. The study shows that musculoskeletal injuries occur frequently during officer training, especially during the first weeks. Recommendations for injury prevention include a more gentle start with slower progression in strain, slow introduction of combat boots, and differentiation of strain according to individual risk factors such as age and gender.