Retired, wealthy sea Captain James McKay arrives in the vast expanse of the West to marry fiancée Pat Terrill. McKay is a man whose values and approach to life are a mystery to the ranchers and ranch foreman Steve Leech takes an immediate dislike to him. Pat is spoiled, selfish and controlled by her wealthy father, Major Henry Terrill. The Major is involved in a ruthless land war, over watering rights for cattle, with a rough hewn clan led by Rufus Hannassey. The land in question is owned by...

Joe Kidd (Clint Eastwood) is a former bounty hunter and all-around tough-guy in the American southwest. When a band of Mexicans find their U.S. land claims denied and all relevant records destroyed in a courthouse fire, they turn to force-of-arms. Luis Chama (John Saxon) is their charismatic leader, spouting revolutionary rhetoric and demanding land reform. A wealthy landowner with interests in the disputed area, Frank Harlan (Robert Duvall), decides to settle things his own way. He hires a band...

A Union Cavalry outfit is sent behind Confederate lines in strength to destroy a rail/supply center. Along with them is sent a doctor who causes instant antipathy between him and the commander. The secret plan for the mission is overheard by a southern belle who must be taken along to assure her silence. The Union officers each have different reasons for wanting to be on the mission.