There were no actual wars directly involving Britain, however there were several confrontations. The most serious came in 1845-1850 when British and French navies blockaded Buenos Aires in order to protect the independence of Uruguay from Juan Manuel de Rosas, the dictator of Argentina. Other lesser controversies with Argentina broke out in 1833, with Guatemala in 1859, Mexico in 1861, Nicaragua in 1894, and Venezuela in 1895 and 1902. There also was tension along the Mosquito Coast in Central America in the 1830s and 1840s.