"A key U.S. ally in the Latin American region, Colombia endured an internal armed conflict for half a century. Drug trafficking fueled the violence by funding both left-wing and right-wing armed groups. Some analysts feared Colombia would become a failed state in the late 1990s, but the Colombian government devised a new security strategy, known as Plan Colombia, to counter the insurgencies. Originally designed as a 6-year program, Plan Colombia ultimately became a 17-year U.S.-Colombian bilateral effort. The partnership focused initially on counternarcotics and later on counterterrorism; it then broadened to include sustainable development, human rights, trade, regional security, and many other areas of cooperation. Between FY2000 and FY2016, the U.S. Congress appropriated more than $10 billion to help fund Plan Colombia and its follow-on programs. For FY2018, Congress appropriated $391.3 million in foreign aid for Colombia, including assistance to promote peace and end the conflict."
CRS Report for Congress, R43813
Congressional Research Service: https://crsreports.congress.gov/