Piła was part of which Prussian administrative region that also included Zbąszyń?
The Grand Duchy of Posen was a Prussian province that encompassed both Piła and Zbąszyń. Piła became part of the Kolmar District within the Bromberg Region of the Grand Duchy of Posen. Zbąszyń was reannexed by Prussia after the Napoleonic Wars and became part of the Grand Duchy of Posen.
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