Rodney had in 1755 and 1756, taken part in preventive cruises under Hawke and Edward Boscawen. In 1757, he took part in the expedition against Rochefort, commanding the 74-gun ship of the line . After an initial success, the expedition made no serious attempt on Rochefort and sailed for home. Next year, in the same ship, he was ordered to serve under Boscawen as part of an attempt to capture the strategic French fortress of Louisbourg in North America. He was given the task of carrying Major General Jeffery Amherst, the expedition's commander to Louisbourg. On the way Rodney captured a French East Indiamen, and took it into Vigo. This action saw the beginning of criticism of Rodney that he was obsessed with prize money ahead of strategic importance, with some claiming he spent two weeks or more in Vigo making sure of his prize money instead of carrying Amherst to Louisbourg. This appears to be untrue, as Rodney sailed within four days from Vigo.