Throughout the mid-1980s, Solidarity persisted solely as an underground organization, but by the late 1980s was sufficiently strong to frustrate Jaruzelski's attempts at reform, and nationwide strikes in 1988 were one of the factors that forced the government to open a dialogue with Solidarity.

Throughout the mid-1980s, Solidarity persisted solely as an underground organization, supported by a wide range of international supporters, from the Roman Catholic Church to the Central Intelligence Agency.

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