Complex sentence: Fort Saratoga was built in 1691 on the west bank of the Hudson River about a mile south of the current village of Schuylerville, New York, which was settled by English colonists shortly thereafter; it was known as Saratoga until 1831.
Split into simpler sentences: Fort Saratoga was built in 1691 on the west bank of the Hudson River. The current village of Schuylerville, New York was settled about a mile south by English colonists shortly after the fort; it was known as Saratoga until 1831.