Analysis of information sources in references of the Wikipedia article "貝塔爾" in Chinese language version.
[Jabotinsky] formed youth groups (Betar) whose practices, patterned after the tactics and symbols of fascism, included wearing brown shirts and using special salutes.
Begin... adhered to his Revisionist ideology throughout his life... He idolized Jabotinsky and served as an officer in the Betar militia in Poland during the 1930s.
