Complex sentence: He held the military rank of Colonel General and participated in the deportations of several ethnic groups, including chechens and ingushes, in the 1940s alongside his comrade-in-arms General Ivan Serov.
Split into simpler sentences: He held the military rank of Colonel General and participated in the deportations of several ethnic groups including Chechens and Ingushes. These actions occured in the 1940s and were carried out alongside his comrade-in-arms General Ivan Serov.