A 1951 border agreement between Poland and the Soviet Union exchanged approximately 480 km² of territory, favoring Soviet economic interests through coal-rich Polish land.
Key Facts
- Territory exchanged
- Approximately 480 km² km²
- Treaty signed
- 15 February 1951
- Treaty came into effect
- 5 June 1951
- Soviet coal mines built
- 4 large mines within 8 years
- Combined annual mining capacity
- 15 million tons tons/year
- Modified prior treaty
- Border treaty of 16 August 1945
By the Numbers
Location
Cause → Event → Consequence
Poland, as a satellite state within the Soviet sphere of influence, was subject to Soviet economic and political pressure. The Soviet Union sought access to valuable coal deposits located in Polish territory along their shared border, leveraging its dominant position to negotiate a territorial swap that would serve Soviet industrial interests.
On 15 February 1951, the Soviet Union and the Polish People's Republic signed a border adjustment treaty in Moscow, exchanging approximately 480 km² of land. Poland relinquished coal-rich portions of the Lublin Voivodeship, including the cities of Bełz, Uhnów, Krystynopol, and Waręż, receiving in return part of the Drohobych Oblast of the Ukrainian SSR, including Ustrzyki Dolne and surrounding villages.
The Soviet Union exploited the acquired coal-rich territory by constructing four large mines within eight years, achieving a combined annual mining capacity of 15 million tons. The transferred Ukrainian SSR territory was eventually incorporated into Polish administrative divisions, while the Ukrainian SSR had no say in the transfer of its own constituent lands.
Political Outcome
Border adjusted by approximately 480 km², with Poland ceding coal-rich land and receiving Ukrainian SSR territory; Soviet Union gained economically significant coal deposits.
Border defined by the treaty of 16 August 1945
Revised border favoring Soviet economic interests; coal deposits transferred to Soviet control