Complex sentence: From his headquarters in Paintsville, on the Big Sandy River, northwest of Prestonsburg, Marshall recruited volunteers and had a force of more than 2,000 men by early January, but could only partially equip them.
Split into simpler sentences: From his headquarters in Paintsville, on the Big Sandy River, northwest of Prestonsburg, Marshall recruited volunteers. He raised a force of more than 2,000 men by early January, but could only partially equip them.