|  | Poland 
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| Poland gained its independence in 1918 only to
    be overrun by Germany and the Soviet Union in World War II. It became a Soviet satellite
    country following the war, but one that was comparatively tolerant and progressive. Labor
    turmoil in 1980 led to the formation of the independent trade union "Solidarity"
    that over time became a political force and by 1990 had swept parliamentary elections and
    the presidency. A "shock therapy" program during the early 1990s enabled the
    country to transform its economy into one of the most robust in Central Europe, boosting
    hopes for acceptance to the EU. Poland joined the NATO alliance in 1999. 
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