After 1773 a steady but growing trickle of Anglo-European settlers took families across the barrier range, or through lower New York State into the Ohio Country—gradually spreading across present-day Ohio along the south shore of Lake Erie and around the bottom of Lake Huron. After the 1778 Sullivan Expedition broke the power of the Iroquois, the New York corridor joined the gaps of the Allegheny, Cumberland Narrows and Cumberland Gap as mountain passes, enabling settlers to pour west into the mid-west, even as the American Revolution wound down.