Adriano,
Depending on the year(s) you're looking for, then the USAF moved its principal helicopter training bases a couple of times during the 50-60s.
See e.g.
http://usafhpa.org/schoolhist/histschool.htm
Main station for US Army helicopter training was and is at Fort Rucker, Alabama.
A nice presentation of H-19 training here:
https://www.youtube.com/watch?v=WIIbql4GLZo
Regards,
Leendert