By Juanita Caballero, Spring 2026 Marcellus Policy Fellow
On November 13, 2025, the United States launched Operation Southern Spear, a military campaign targeting suspected drug trafficking vessels in the Caribbean and Eastern Pacific. The operation has deployed approximately 15,000 personnel, carrier strike groups, bombers, and amphibious assault ships, making it one of the largest U.S. military buildups in the hemisphere since the Cold War. By May 2026, the campaign had conducted 56 lethal maritime strikes killing at least 199 people, at a cost of $31 million per day.
The core problem is strategic misalignment. Southern Spear targets maritime cocaine routes at a moment when fentanyl and other synthetic opioids account for the overwhelming majority of U.S. overdose deaths. Fentanyl is produced in Mexico from precursor chemicals sourced primarily from China and India, and it enters the United States across the U.S.-Mexico land border, not through Caribbean or Pacific maritime corridors. A growing share of the cocaine moving through those same corridors is bound for Europe, not the United States. The operation directs maximum force against a secondary trafficking dimension while the deadliest one goes unaddressed.
The operation is also badly mismatched to the nature of its target. Drug trafficking organizations are decentralized criminal networks that absorb enforcement pressure by rerouting shipments, replacing personnel, and splintering into smaller groups. Mexico’s twelve-year militarized campaign under Presidents Calderón and Peña Nieto generated higher violence, cartel fragmentation, and geographic displacement without reducing trafficking in any measurable way. Southern Spear rests on a deterrence rationale that imposes costs on replaceable low-level operators while leaving cartel leadership and financial networks untouched. The diplomatic damage is equally severe: the operation has alienated Brazil, Colombia, and Mexico, the three most consequential counternarcotics partners in the hemisphere.
A more effective strategy already exists. The United States should (1) pursue sustained diplomatic engagement with China and India to cut off precursor-chemical exports, building on the documented 2019 precedent that reduced overdose deaths by approximately 25 percent within months; (2) replace Southern Spear with a whole-of-government strategy centered on Treasury financial sanctions, Drug Enforcement Administration financial intelligence, Justice Department prosecutions, and Department of Homeland Security land-border enforcement; (3) strengthen the Joint Interagency Task Force South to its central role and expand its multilateral integration capacity; and (4) deepen economic engagement in Latin America through targeted instruments,including the Development Finance Corporation (DFC), to address the structural conditions that sustain trafficking and contest China’s expanding influence in the region. Counternarcotics policy succeeds when the instruments deployed match the structure of the threat. Replacing Operation Southern Spear with a strategy grounded in diplomacy, financial disruption, multilateral interdiction, and economic engagement would align U.S. policy with the actual drug crisis the country faces.