Costa Rica–Nicaragua San Juan River border dispute
The Nicaragua–Costa Rica San Juan River border dispute was a series of periodical conflicts between Costa Rica and Nicaragua over the correct delimitation of their common border at its east-end, and the interpretation of the navigation rights on the San Juan River established in the Cañas-Jerez Treaty of 1858.
The most recent disputes include an interpretation about the scope and limits of Costa Rica's rights for free navigation and Nicaragua's sovereign control over the San Juan River, which was resolved by the International Court of Justice in 2009; and the ongoing dispute that began in October 2010 regarding the dredging of San Juan River, in the area of Isla Calero. This last dispute was referred in the media as the Google Maps War.