The 1807 Act of Congress was modified and supplemented by the Fifteenth Congress. The importation of slaves into the United States was called "piracy" by an Act of Congress that punctuated the era of good feeling in 1819. Any citizen of the United States found guilty of such "piracy" might be given the death penalty. The role of the Navy was expanded to include patrols off the coasts of Cuba and South America. The naval activities in the western Atlantic bore the name of "The African Slave Trade Patrol of 1820–61". The "blockade of Africa" was still being performed in the eastern Atlantic at the same time.