Important role in fighting communism had a common religion of the Polish society. Over 90% of the society defined themselves as Catholics. Religion is thought to be something that brought people together giving hope and a feeling of participation. After World War II authorities continuously run Polish anti-religious campaign aimed at (inter alia) the Catholic Church in Poland. In 1956 the limitations were eased and the Church leaders became more active in the society with cardinal Stefan Wyszyński in the lead. 1966 was an important year for Polish citizens, country celebrated the Millennium of the Polish State and at the same 1000 years of the Christianization of Poland. The anniversary was used by both the church and the ruling party for the propaganda purposes. Communistic government wanted to focus on the celebration without the religious context presenting it as the Millennium of the Polish State. On the other hand, the Catholic Church wanted to underline the relationship between Catholicism and the Polish State and their common origins since establishment of the Polish State started from the baptism. Not only Catholic Church in Poland was confronted. The communistic government aimed their actions towards other religions including Jewish Community in Poland, resulting in migration of thousands of them.