Eleven years later, in 1995, John (Edward Furlong, who will gleefully return for Terminator: Dark Fate) is the direct target of Skynet, with his opposition sending a new unit to take him out, The T-1000 (Robert Patrick). However, John Connor sends himself a new protector to fight this menace: a reprogrammed T-800 unit from 2029. The very machine that was supposed to stop him from even being born is now sworn to not only save him, but also his mother, Sarah.
Article source: https://www.cinemablend.com/news/2480237/terminator-lets-untangle-the-franchises-convoluted-timelines-ahead-of-dark-fate