Kohl participated in the late stage of WWII as a teenage soldier. He joined the Christian-Democratic Union (CDU) in 1947.
Kohl joined the Christian-Democratic Union (CDU) in 1947, but was unhappy while he was a part of it. 
( z1 contrast :ARG1 ( z2 join :ARG0 ( z3 person :name ( z4 name :op "Kohl" ) ) :ARG1 ( z5 political-party :name ( z6 name :op "Christian-Democratic" :op "Union" ) ) :time ( z7 date-entity :year 1947 ) ) :ARG2 ( z8 happy :polarity - :ARG1 z3 :time ( z9 have-part :ARG1 z3 :ARG2 z5 ) ) )