- 1936 Born in Manchuria, China
- 1953 Began martial arts
- 1954 Received 1st Degree
- 1955 Began teaching Taekwondo
- 1956 Trained Korean military
- 1959 Opened Taekwondo school in Korea
- 1961 Met Master Richard Reed
- 1962 Arrived in U.S. and started teaching in Omaha, NE
- 1969 Founded ATA
- 1970 Received 7th Degree
- 1973 Became U.S. citizen
- 1975 Married Mrs. Sun C. Lee
- 1977 Relocated ATA Headquarters to Little Rock, AR
- 1978 Received 8th Degree
- 1978 Began hosting Grand Nationals Tournament
- 1980 Computerized ATA
- 1983 Created Songahm style
- 1983 Started Taekwondo World magazine
- 1983 Founded Songahm Taekwondo Federation (STF)
- 1990 Hosted first World Championships
- 1990 Inaugurated to 9th Degree and received title of Grand Master
- 1990 Founded World Traditional Taekwondo Union (WTTU)
- 1991 Established Master H.U. Lee Foundation
- 1992 ATA Day: March 22,
- 1992 Congressional Record
- 1992 Introduced The Way of Traditional Taekwondo book series
- 1993 Arkansas Business of the Year award
- 1994 Presented with ATA patch taken into space by space shuttle
- 1997 Created The Way of Traditional Taekwondo video series
- 1998 Established Black Belt Academy franchise program, created Songahm Systems International
- 2000 Grand Opening of new Songahm Headquarters
- 2000 Passed away in Little Rock, AR; posthumously awarded title of Eternal Grand Master
