The internal conflict in Colombia has propelled the development of security sector reform (SSR) programs; however, these programs have been usually linked to the influence of relations between the United States and Colombia in military and foreign policy terms. The main objective of this essay is to understand said interplay from the mid-1990’s to the early 2000’s, which marked the biggest transformations to the Colombian defense sector in human rights, doctrine, equipment, and human capital. The analysis shows that such influence allowed for the consolidation of an offensive strategy which helped the Colombian government turn the balance of the internal conflict in its favor.