Your lack of knowledge is showing . Following is an escerpt naming Jhoon Rhee progeny of the Texas "Blood and Guts days" who are well known fighters.
"Allen Steen met Jhoon Rhee
Allen Steen met Jhoon Rhee (the man who brought Tae Kwon Do to the United States) as a fellow student at the University of Texas in 1959. He enrolled in Mr. Rhee's class, which was the first major University martial arts program in Texas.
In 1962, Mr. Steen opened the first commercial Tae Kwon Do / Karate school in the United States outside of New York, Chicago and California becoming known as the "Father of Texas Karate." That first year he enrolled almost a thousand students.
Steen earned his black belt in September of 1962. He presented his first black belt (to J. Pat Burleson, Steen's senior student) in 1963. Mr. Steen's reputation as a champion and trainer of champions remains unparalleled. Grandmaster Steen's many champions include Burleson, Skipper Mullins, Fred Wren, Demetrius Havanas, Roy Kurban, Jim Harkins, Keith Yates, Jim Miller, Jeff Smith, George Minshew, Ray McCallum and Larry Wheeler.
Steen won dozens of championships
Steen won dozens of championships in an impressive competitive career. In 1966 he beat the top two competitors in the country back to back, Chuck Norris and Joe Lewis, to become the only Texan to win the prestigious Grand-championship of the International Karate Championships."
And yes there is a "Story" he was ambushed by 3 thugs on the street and took a beating. (Unable to verify story) So what?