After the War of 1812, whaling became a very important part of Groton's economy, but most of the expeditions were still for seal skins. Before 1820, sealers went to Antarctica, where their ships would drop them off. They would kill the seals and then prepare the skins for some weeks, until their ship returned for them. By 1830, whaling had become Mystic's main business. By 1846, Groton became one of the world's prime whaling ports. Whaling was difficult and dangerous, but boys would go out to sea to make their fortune, nonetheless, in the hope that some of them would eventually come to command a vessel.