Complex sentence: Instead, he chose to disengage from the fort and continued slowly northward towards Santa Fe, on the other side of the border in New Mexico Territory, hoping to reach the supplies located there and also to cut Fort Craig's lines of supplies and communications.
Split into simpler sentences: Instead, he chose to disengage from the fort and continued slowly northward towards Santa Fe, on the other side of the border in New Mexico Territory. Hoping to reach the supplies located there and also to cut Fort Craig's lines of supplies and communications.