The Begin children took part in the local Jewish youth movements. Menachem Begin initially joined the “Shomer HaTzair”, at a time when it was a scouts movement, but once it became a Marxist-oriented movement, Begin left it and joined the Betar youth movement, founded by Ze’ev Jabotinsky. Begin was a key activist, and later became commander of the Brisk Headqueaters. In his memoirs, he said: “What drew me to Betar was the Complete Zionism, the Land of Israel, a Jewish state soon in our days.”

In 1930, he first heard Ze’ev Jabotinsky, founder of the Jewish Legion and leader of the Revisionist Party and Betar, who had visited Brisk. Later Begin defined his impression of the man who made him head of Betar: “Won over? – No. More than that. sanctified”.