 Complete the following phrase:  There was a very tense climate in 19181920, a time of decision. It was decided that a plebiscite would be held in Cieszyn Silesia asking people which country the territory should join. Plebiscite commissioners arrived at the end of January 1920 and after analyzing the situation declared a state of emergency in the territory on 19 May 1920. The situation in the territory remained very tense. Mutual intimidation, acts of terror, beatings, and even killings affected the area. A plebiscite could not be held in this atmosphere. On 10 July both sides renounced the idea of a plebiscite and entrusted the Conference of Ambassadors with the decision. Eventually 58.1 of the area of Cieszyn Silesia and 67.9 of the population was incorporated into Czechoslovakia on 28 July 1920 by a decision of the 