Complex sentence: In 1740, the majority of Saponis and Tutelos moved to Shamokin, Pennsylvania and surrendered to the Iroquois, joining them in New York where they were formally adopted by the Cayuga in 1753.
Split into simpler sentences: In 1740, the majority of Saponis and Tutelos moved to Shamokin, Pennsylvania and surrendered to the Iroquois. They joined the latter in New York, where they were formally adopted by the Cayuga in 1753.