Colombia The Panamanians won independence from Colombia (after being aided by Theodore Roosevelt). FOR THE RECORD: the map above is of "Gran Colombia", Colombia just retained Panama after the split.
Panama celebrates court order to cancel mine even as business is hit, Mining
Gran Colombia, History, Attractions, Map, & Facts
Belize
Black Laborers on the Panama Canal - Picturing Black History
Panama Canal - Construction, US Intervention, Trade
Droughts and Scarcity before Independence in the Viceroyalty of New Granada, 1800–1810
Drought Saps the Panama Canal, Disrupting Global Trade - The New York Times
United States territorial acquisitions - Ballotpedia
Happy Independence Day, Panama: What You Need to Know About the Holiday
Panama: How a country of chaos became a bridge across the Americas