During the 1830s and 1840s, the British and French governments were at odds with Rosas' leadership of the Argentine Confederation. Rosas' economic policies of requiring trade to pass through the Buenos Aires custom house – which was his method of imposing his will on the Littoral provinces – combined with his attempts to incorporate Paraguay and Uruguay to the Confederation, were in conflict with French and British economic interests in the region. During his government, Rosas had to face numerous problems with these foreign powers, which in some cases reached levels of open confrontation. These incidents included two naval blockades, the French blockade in 1838, and the Anglo-French of 1845.