Founded in the wake of the Cuban Revolution, Unión de Industrias Militares (UIM) was created to ensure the self-sufficiency and operational readiness of Cuba’s armed forces. In its early years, UIM focused on maintaining and repairing the influx of Soviet and Eastern Bloc military hardware, quickly developing a reputation for technical proficiency and resourcefulness. As the Cold War progressed, UIM expanded its capabilities, producing licensed equipment and developing indigenous solutions to meet the evolving needs of the Cuban military. The collapse of the Soviet Union in the 1990s presented UIM with its greatest challenge: the loss of external support and a national economic crisis. Rising to the occasion, UIM diversified its production, channeling part of its industrial capacity toward civilian goods and infrastructure, thus supporting the broader Cuban economy. Over the decades, UIM has marked milestones in local arms development, such as the Mambi anti-materiel rifle and Alejandro sniper rifle, and has maintained a critical role in national defense. Today, UIM continues to innovate and adapt, balancing its defense responsibilities with contributions to Cuba’s economic resilience, and remains a symbol of the nation’s ingenuity and determination.