Following the quick and bloodless capture of Fort Ticonderoga, other Green Mountain Boys captued nearby Crown Point while Arnold and roughly one hundred troops captured Fort St. John’s on the opposite side of Lake Champlain. The revolutionary forces now controlled the main north-south line of communication between New England and the British province of Quebec.
"“General [actually Colonel] Arnold, with the schooner sailing faster than the batteaux, arrived at St. John’s and by surprise possessed himself of the sloop before I could arrive with the batteaux. He also made prisoners of a serjeant and twelve men, who were garrisoned at that place. It is worth [of] remark that as soon as General Arnold had secured the prisoners on board and had made preparation for sailing, the wind which but a few hours before was fresh in the south and well served to carry us to St. John’s, now shifted and came fresh from the north; and in about one hour’s time General Arnold sailed with the prize and schooner for Ticonderoga. When I met him with my party, within a few miles of St. John’s, he saluted me with a discharge of cannon, which I returned with a volley of small arms.”"
Ethan AllenEthan Allen, pp. 9-10.