Complex sentence: In the end it was operated by the Primary Air Reserve in Montreal, Toronto and Winnipeg, with approximately 10 aircraft at each base, as well as by the RSU (Regular (Forces) Support Units) at those bases.
Split into simpler sentences: In the end it was operated by the Primary Air Reserve in Montreal, Toronto and Winnipeg, with approximately 10 aircraft at each base. And also by the RSU (Regular (Forces) Support Units) at those bases.