Learning that Montana is about to become a state and that property values will rise rapidly, Caldwell is using his outlaw gang to force the ranchers off their land.
Don Diego is a large ranch owner, the uncle of Dolores and the guardian of a young American, Steve Randall. Steve has just delivered a large herd of cattle to the ranch, where Don Diego has just found out that he must pay the local tax commissioner, Harkness a fine for unpaid taxes on a herd of over one-thousand cattle. Steve offers to drive the cattle to the commissioners office, even though he fells the fine is unjust. Arriving at the office, Steve learns that Harkness (who he has never met), who has a reputation for dishonesty, is out. Dropping by the cantina, Steve gets into a fight with Harkness, and Harkness swears vengeance on Steve, especially after Steve stampedes the cattle through the town.
Dan Hurley wants to sell wild horses and is trying to get the Wild Game Laws that protect them changed. To get his petition signed, his henchman paints his trained horse to look like the wild horse leader and has it kill a man. Johnny Revere finds traces of paint on a horse and tries to arrest Hurley and his men. But he is captured by the gang and is now slated to be the next victim of the trained horse.
Horse breeders Adams and Brock are vying for the Army contract. When Adams is killed trying to ride his horse Trigger, Roy saves the horse from being shot. He trains him and then plans to ride him in the race to win the contract.
This film was produced and released in 1944 by Film Enterprises for the 16mm school-and-institutional market, and was picked up and released in 1948 by Astor for theatrical 35mm showings. Both versions finds the citizens of Rockford upset over a series of murders and robberies. The Sundowners, Andy Clyde (Andy Clyde), Jay Kirby (Jay Kirby) and Russ Wade (Russell Wade), ride into Rockford and innocently takes jobs with Tug Wilson (Jack Ingram) and his tough crew of line riders, who are in cahoots with Yeager (Hal Price) in a big land swindle scheme.
With a plot line mostly lifted from 1941's "White Eagle", Columbia's 24th serial (following "The Desert Hawk-1944" and ahead of 1945's "Brenda Starr, Reporter"), "Black Arrow" finds carpet-baggers Jake Jackson and Buck Sherman arriving in Blue Mesa in search of gold.
Bat Masterson, who after failing to secure a job as a newspaper reporter becomes marshal of Dodge City. Preferring socializing to peacekeeping, Masterson falls in love with Dora Hand, the obligatory golden-hearted chorus girl whose concern for the welfare of her fellow citizens at time reaches Madonna-like dimensions. When Dora is shot down cattle baron King Kennedy, Masterson begins taking his job seriously. After taking care of Kennedy, Masterson determines to enshrine the memory of Dora, whose efforts to clean up Dodge City were largely ignored by the "decent" townsfolk.
World War II is raging and the manpower shortage has hit the range since every able-bodied cowboy of military age is off fighting for Uncle Sam. Dad Mathews, a rancher with a huge government contract order for beef, has trouble with the cattle rustlers, led by Henry Judson and Lefty Lewis, who are taking advantage of the situation to steal his herds. John Paul Revere, Special State Investigator, arrives, and upon meeting Mathews' daughter, Betty, gets the idea of recruiting the hard-riding daughters of the district into the WAPS, an organization which will be to the cattle country what the WACS and WAVES are to the Army and Navy. He trains them in military procedure and provides them with radio sending-and-receiving sets. Johnny's sidekick, Frog Millhouse, finds himself the possessor of a "walkie-talkie" which he considers just a "doo-dad" at first, but which is instrumental in the end, in helping Johnny and the WAPS trap the gang of rustlers in their hideout.
During the Civil War, three American soldiers are sent, disguised as civilians, to California to gather evidence that Southern agents there are agitating for that state to join the Confederacy with the aid of California's governor.
When Rangers Lucky and his brother chase outlaws, the brother is killed. To find the killer Lucky quits the Rangers and robs the bank. This gets him into the outlaw gang where he learns of their next raid. Sneaking out at night he tells his girl friend who must now convince the Sheriff that Lucky is not an outlaw and that he must sent his men out to catch the gang.
A rancher who becomes a pilot staunchly defends the newly formed Civil Air Patrol from the cattle barons who fail to see the value of airplanes on the range.
Cowboy Dan Somers and oilman Jim "Hunk" Gardner compete for oil lease rights on Indian land in Oklahoma, as well as for the favors of schoolteacher Cathy Allen.
When a fed-up businessman tires of watching gold shipments disappear without a trace, he calls in the Trail Blazers (Ken Maynard, Hoot Gibson and Bob Steele) -- a legendary trio of law enforcers -- to find the gold and figure out who's behind the thefts.
When Ranger Hoppy's falsely accused young ranger friend is killed while supposedly trying to escape from jail, Hoppy is blamed and drummed out of the Texas Rangers.
Marshals Nevada and Sandy are after Scully and his gang who have been robbing stage-coaches. The Texas Kid is part of the gang and Sandy thinks he is bad but Nevada knows him and thinks he may be good.
Unknown to oil company president Ross, his man Quinn is pulling a swindle on the independent drillers. Quinn controls both the Judge and the Marshal. But when the Marshal is accidentally killed, Wild Bill Elliott is brought in as the new Marshal and things begin to change.
A mystery man, identifying himself as the outlaw Nevada Kid, and his comical sidekick, help the townspeople of Canyon City solve a series of murders, robberies, and threats to destroy their new power dam in the first days of electrification of the wild west.
Texas Rangers Tex Wyatt, Jim Steele and Panhandle Perkins are sent to the district of Rawhide to investigate the killings of several ranchers. Tex enters the town posing as a tramp while the other two Rangers join a troupe of itinerant minstrels.