Someone was not too up on his American history in the creation of this show which had G-Men, the slang term for FBI agents out there in boots and chaps in the old west. The Federal Bureau Of Investigation was not founded until the Theodore Roosevelt Administration under Attorney General Charles J. Bonaparte. And yes, he was one of THE Bonapartes. That would be the 20th Century.
In fact the Department of Justice was created in the Grant Administration, an achievement not often credited to that beleaguered president. But it had no investigative arm operating out of Washington. Such investigations they did do were under the supervision of whatever US Attorneys the jurisdiction fell.
So basically what I'm saying is that Cowboy G-Men had no basis in fact whatsoever. But as a little kid of five when this show premiered, these things didn't prevent me from enjoying the adventures of Russell Hayden and Jackie Coogan every week. Phil Arnold was in about 60% of the shows and his scenes with Jackie Coogan were definite comic relief.
Not the best quality westerns, but enjoyable nonetheless.