Complex sentence: In the original Teruel defensive force including the garrison, casualties were about 9,500 and nearly all were dead or captured, giving a total of 56,500 casualties for the Nationalists.
Split into simpler sentences: In the original Teruel defensive force including the garrison, casualties were about 9,500 and nearly all were dead or captured. That is a total of 56,500 casualties for the Nationalists.