Contemporary attempts and forms of creating various integration organizations, associations and euroregions, resulting from changes in Europe, have roots reaching far back into the Middle Ages. Such cooperation originated from the need for cities to work together economically, trade jointly, and also provide mutual defense. Bolesławiec, situated on an important route to Germany and the Czech lands, was naturally compelled to seek contact with neighboring towns. In the summer of 1346, Bolko II Świdnicki, Duke of Świdnica and Jawor, to whose duchy Bolesławiec belonged, approved a defensive alliance of the Silesian towns of his duchy, comprising: Bolesławiec, Chojnów, Jawor, Jelenia Góra, Lwówek, Wleń and Złotoryja. We can only surmise that the alliance concerned mutual military and defensive assistance among these towns.
In 1355, under the date of 30 December, we find a record of the formation of an alliance of 10 Silesian towns, which included Bolesławiec. After the Świdnica-Jawor Piast dynasty died out and the Duchy of Świdnica-Jawor came under Czech rule, the towns still saw the need for cooperation, since under the date of 15 March 1367 we find a record of an alliance of 7 Silesian towns, including Bolesławiec, Jawor and Strzegom. In 1384 (29 April), such an alliance is still recorded under that date.
There was a need for such an alliance, and even for its expansion to include additional towns, while limiting its character to that of a military alliance.
Under the date 1398, there is a record of Bolesławiec belonging to an alliance of 14 Silesian towns of a military nature. It cannot be ruled out that such alliances significantly limited the damage and the extent of the Hussites' activities in Silesia.
At the same time, Bolesławiec itself sought opportunities for cooperation with the nearest towns. Following the Hussites' famous attack on the town in 1429, it concluded an agreement with Lwówek the following year, in 1430, to provide mutual assistance in the event of an attack.
After the Hussite Wars ended, the towns confirmed the necessity of maintaining the alliance, and in 1435 an alliance was concluded by the towns of Bolesławiec, Jawor, Jelenia Góra, Lwówek, Strzegom and Świdnica—directed, as the chronicler states, against robbers, criminals and arsonists, and also intended to facilitate cooperation in pursuing offenders.
In the 16th century and the centuries that followed, we do not encounter such forms of cooperation. After 1526, Silesia passed from Czech rule under the rule of the Habsburgs.
In 1527, we find a record of Bolesławiec belonging to the great Confederation of Princes and Nobility formed that year, but it no longer had any practical significance for the town, serving rather a symbolic purpose.
Today's attempts at the integration and cooperation of towns and municipalities (e.g. "Kwisa Region") confirm that there are always greater chances of achieving something together than alone—and this was already known in the Middle Ages.