Complex sentence: Stationed in Baranowicze and commanded by Colonel Wilhelm Andrzej Lawicz-Liszka, it was in the summer of 1939 moved west and became part of the Army Modlin.
Split into simpler sentences: Stationed in Baranowicze and commanded by Colonel Wilhelm Andrzej Lawicz-Liszka. In the summer of 1939 it was moved west and became part of the Army Modlin.