Freehold by William C. Dietz
Colonel Stell and his band of mercenaries yearn for a place to call home. To them Freehold is like a bright diamond in the vast universe. But its desert conditions, economic instability, social disarray, and political turmoil render the planet perfect for takeover. Willing to fight anything that stands in their way, Colonel Stell and his small crew contend with all who seek to dominate their planet, even vast interstellar empires. Their success will not be determined by their size but by their resolution to create creating a home for themselves.