How are environmental topics—especially those related to climate change—taught to Brazilian officers via military training? Searching the curricular documents for the answers to this question, the chapter analyzes how environmental issues, particularly climate change, are addressed in the training of Brazilian Army officers. The research suggests that while these issues are increasingly relevant to global security, the inclusion of environmental subjects in Brazilian military curricula is limited. The study also reveals that although topics such as environmental management appear, the depth and frequency vary depending on the officer’s rank and specialization. Engineers receive more content on this subject. However, complex aspects such as climate change are not addressed, which creates gaps in military training. As a “total institution”, the Army shapes the officers’ view of the world, but the study concludes that, despite society’s demand for the institution’s support in relation to climate change, as well as the politicization that the topic receives in the political environment, the lack of critical engagement with environmental issues in training can impact the Army’s ability to address climate challenges. This suggests the need for future research into how these values ​​are shaped outside of formal education.​