Complex sentence: The massacre led to a series of battles and campaigns fought between the Americans, the Apache, and their Yavapai allies, which continued into 1875, the most notable being General George Crook's Tonto Basin Campaign of 1872 and 1873.
Split into simpler sentences: The massacre led to a series of battles and campaigns fought between the Americans, the Apache, and their Yavapai allies, which continued into 1875. The most notable being General George Crook's Tonto Basin Campaign of 1872 and 1873.