Logistics in a hypothetical war of the Americas

Could all Central and South American states combined take on the United States in a war?

Probably not. The coalition would struggle to concentrate its resources, while U.S. land forces and naval infrastructure would already be positioned near the likely approaches.

The scenario is first a logistical problem rather than a simple comparison of national totals. A coalition would have to move personnel and equipment from widely separated states to the points where they could be used against the United States. U.S. bases and National Guard formations in the southern states would sit close to the likely land approaches. A maritime route would instead encounter a U.S. Navy with substantially greater fleet and support infrastructure than the coalition could combine. This counterfactual shows how proximity, transport, readiness, and sustainment can outweigh aggregate resources.