Complex sentence: The arming and training of some of his devoted followers began, the Guru came to possess seven hundred horses, and his Risaldari (army) grew to three hundred horsemen and sixty musketeers.
Split into simpler sentences: The arming and training of some of his devoted followers began. The Guru came to possess seven hundred horses and his Risaldari (army) grew to three hundred horsemen and sixty musketeers.