Complex sentence: At the same time the strategy forced the government to increase the size of the army; with control of the major cities, the government cracked down on KKE members and sympathizers, many of whom were imprisoned on the island of Makronisos.
Split into simpler sentences: At the same time, the strategy forced the government to increase the size of the army. With control of the major cities, the government cracked down on KKE members and sympathizers, many of whom were imprisoned on the island of Makronisos.