Complex sentence: A total of 64 Bengal Army battalions rebelled during the Indian Mutiny: accordingly the Bengali presence in the Bengal Army was reduced in the late nineteenth century because of their perceived primary role as mutineers in the 1857 rebellion.
Split into simpler sentences: A total of 64 Bengal Army battalions rebelled during the Indian Mutiny. The Bengali presence in the Bengal Army was reduced in the late nineteenth century because of their perceived primary role as mutineers in the 1857 rebellion.