Polskie działania nad Olzą po podziale Śląska Cieszyńskiego w 1920 roku w świetle doniesień czeskich agentów

Cieszyn Silesia is a region which occupies both sides of the current Czech-Polish border. However, in the past, for many centuries it constituted a cohesive administrative unit belonging to Poland, Czech and Austria. After the I World War, Europe saw the formation or rebirth of several nations, such as Czechoslovakia and Poland. At that time, the region in question presented a rich cultural mosaic, even though the majority of the inhabitants were of Polish descent. The region was dedicated primarily to heavy engineering and coal mining.At the end of 1918, a conflict arose between the First Republic and the Second Polish Republic for this patch of Silesia, which ended with the decree of the Council of Ambassadors of 28 July 1920, ordering the division of the disputed area along the Olza river. The authorities in Warsaw did not come to terms with this verdict, and for a few months they entertained the prospect of regaining the land west of the Olza. The Czechoslovak government, in turn, carefully observed at the actions of its northern neighbour, while its agents sent reports to Prague about the current situation. The relations between the two countries had not stabilized until 1922.