International border
 
The Honduras–Nicaragua border is the roughly international boundary between Honduras and Nicaragua, running from the Gulf of Fonseca on the Pacific Ocean to the Caribbean Sea. The Coco River, which flows generally northeast to the Caribbean, forms more than half of the border.
The border passes between the following departments, from west to east:
Honduras and Nicaragua, respectively, were part of the Central American Federation and the United Provinces of Central America. Between 1823 and 1838, these federations fell apart and both nations gained their independence and defined their border.
In 1937, the issuance of a stamp from Nicaragua with a sticker on part of Honduran territory indicating "territory in dispute" almost caused a war between the two countries. The territory had been claimed by Nicaragua, but Honduras thought the matter closed in 1906 when an arbitration by King Alfonso XIII of Spain gave it the area.
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