Brenda, as you now know, the town in question is called Oesede.Oesede is located in the District (in German: Kreis) of Osnabrück in the western part of what was until 1866 the Kingdom of Hanover (in German: Hannover), the capital of which was the city of Hanover.
Like most of the major German states, Hanover sided with Austria against Prussia in the Austro-Prussian War, or Seven Weeks War, in 1866. Austria and her allies were defeated. The Kingdom of Prussia (in German: Preussen; capital: Berlin) thereupon annexed Hanover, which then became what was to remain until 1945 the Prussian province of Hanover.
Following World War II and the break-up of the huge state of Prussia, the Prussian province of Hanover, the state of Oldenburg, and the two very small states of Brunswick (in German: Braunschweig) and Schaumburg-Lippe combined to form today's German state of Lower Saxony (in German: Niedersachsen), with the city of Hanover as its capital.
Oesede is thus located in the western part of today's state of Lower Saxony (Niedersachsen).
Oesede is no longer an independent town. In 1970, Oesede became part of the city of Georgsmarienhütte -- or if written without the "Umlaut" (two dots) over the "u", Georgsmarienhuette. Georgsmarienhütte is only about 5 miles south of the city of Osnabrück -- or if written without the "Umlaut" over the "u", Osnabrueck -- and about 80 miles west of the city of Hanover.The area is known for the mining of iron ore and for the steel industry.("Hütte" is the German word for "foundry".)
Here is a map of pre-1945 Hanover, so that you know what it looked like. (Hanover is in purple). If you look to the west, you will see the city of Osnabrück. As mentioend, Georgsmarienhütte is only about 5 miles south of Osnabrück.To give you an idea of size as you look at the map, Hanover covered an area roughly equivalent to that covered by the U.S. states of Maryland and Delaware combined.