What do you want to know about that.. the location? Seems to have been in Posen/West Prussia.
And is it written correctly, quote: "Milschhauland' in Kolmar Pomerania, possibly Dreihaus".?
The word Milschhauland exists, but it seems to be Dreihäuser (Dreihaeuser without german
Umlaut) which would be the plural of Dreihaus (the latter would be singular).
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Also here:
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A voivodship oder "Woiwodschaft" is an administrative district within Poland.
https://de.wikipedia.org/wiki/Kreis_Kolmar_i._Posen in german, english translation (for what it's worth - probably nothing lol):
"The area around the cities of Chodziesen and Schneidemühl belonged after the first division of Poland from 1772 to 1807 to the district of Deutsch Krone in the network district in the Prussian province of West Prussia. [1]
Due to the Peace of Tilsit, this area fell to the Duchy of Warsaw in 1807 and returned to Prussia after the Congress of Vienna on May 15, 1815. As part of the Prussian Provincial Authority Ordinance of April 30, 1815 and its implementing provisions, the southern part of the old district of Deutsch Krone came to the administrative district of Bromberg in the province of Poznan. The district of Czarnikau was formed from this area on July 1, 1816. [2] [3] In a further district reform in the province of Poznan, the new district of Chodziesen was essentially formed from January 1, 1818, with the addition of smaller parts of other districts from the eastern half of the district of Czarnikau. [3] The cities of Budsin, Chodziesen, Margonin, Samotschin, Schneidemühl and Usch, the domain offices of Podstolitz and Zelgniewo (Selgenau) and a large number of noble estates came to the Chodziesen district. [4] The seat of the district office was initially Schneidemühl and from 1821 Chodziesen.
As part of the province of Poznan, the Chodziesen district became part of the newly founded German Empire on January 18, 1871. The conservative candidate Adelbert von der Schulenburg-Filehne won the 1871 Reichstag election. On March 6, 1877, the district and the district town were moved to Colmar i. Poznan renamed. On April 1, 1914, the city of Schneidemühl left the district and became its own district.
On December 27, 1918, the Greater Poland revolt of the majority of the Polish population against German rule began in the province of Poznan. In early January 1919, the district town of Kolmar was temporarily occupied twice by the Polish. Except for the south of the district around the city of Budsin, the Kolmar district remained under German control.
On February 16, 1919, an armistice ended the Polish-German struggles, and on June 28, 1919, with the signing of the Versailles Treaty, the German government officially ceded three quarters of the district (898 km²) together with the district town of Kolmar to the newly founded Poland. Germany and Poland signed an agreement on November 25, 1919 on the evacuation and surrender of the areas to be ceded, which was ratified on January 10, 1920. The clearing of the district to be ceded and handed over to Poland took place between January 17 and February 4, 1920. The county town of Kolmar was taken over by Poland on January 19, 1920. From most of the Kolmar i. Poznan became the Polish Powiat Chodzieski; only the municipalities of Schönfeld, Stöwen and Usch Hauland from the northern part of the district remained, as did the city district of Schneidemühl in the German Empire and came to the Prussian province of Grenzmark Posen-West Prussia. Schönfeld came to the Flatow district; Stöwen and Usch Hauland came to the newly formed network."