Complex sentence: The demilitarized zone on the border of the Western Frontier and Tundran Territories has been the sight of an uneasy truce between two powerful armies for many months with both nations ready to retaliate in the event of a pre-emptive strike.
Split into simpler sentences: The demilitarized zone on the border of the Western Frontier and Tundran Territories has been the sight of an uneasy truce between two powerful armies for many months. Both nations were ready to retaliate in the event of a pre-emptive strike.