Complex sentence: First delivered to the 20th Field Army in summer 2013 and its Armored Guards Brigade in October 2013, a total of 220 T-72B3 tanks were delivered in 2013, and 294 in 2014, and 50 tanks delivered as of July 2015.
Split into simpler sentences: First delivered to the 20th Field Army in summer 2013 and its Armored Guards Brigade in October 2013. A total of 220 T-72B3 tanks were delivered in 2013, and 294 in 2014, and 50 tanks delivered as of July 2015.