Duchy of Masoviaball is Luki1223 was a medieval duchy in 
Polandball whose capital cityball was Plockball.
History
Duchy of Masoviaball was founded in 1138 by 
Kingdom of Polandball as a part of itself. In 1226, the Duchy of Masoviaball invited 
Teutonic Orderball together and gave them some lands. Kingdom of Polandball suffered the consequences of that act later. Duchy of Masoviaball initially fought with Teutonic Orderball against Kingdom of Polandball. After losing changed sides and the Duchy of Masoviaball fought together with Kingdom of Polandball against Teutonic Orderball. In the years 1351-1526, Duchy of Masoviaball was the fief of the Kingdom of Polandball and was eventually annexed by it in 1526.
Gallery
The Republic of Poland:The Independent, Can't Into Space .png){kind=icon} And The Great Kingdom
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| Voivodeships |  Greater Polandball •  Kuyavia-Pomeraniaball •  Lesser Polandball •  Łódźball •  Lower Silesiaball •  Lublinball •  Lubuszball •  Masoviaball •  Opoleball •  Podlaskieball •  Pomeraniaball •  Silesiaball •  Subcarpathiaball •  Swietokrzyskieball •  Warmia-Masuriaball •  West Pomeraniaball
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| Cities |  Bialystokball •  Bydgoszczball •  Chorzówball •  Gdanskball •  Gorzow Wielkopolskiball •  Katowiceball •  Krakowball • -icon.png){kind=icon} Łódźball •  Lublinball •  Poznanball •  Rumiaball •  Szczecinball •  Warsawball •  Wroclawball
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| Former entities |  2balls •  Slavsball •  Duchy of Polandball • Kingdom of Polandball •  Polish-Lithuanian Commonwealthball • Duchy of Warsawball •  Russian Empireball ( Congress Polandball) • Kingdom of Polandball •  Second Polish Republicball •  General Governmentball •  People's Republic of Polandball
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.png){kind=icon} Bóg, Honor, Ojczyzna!
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