Why did Prussia support the Schleswig-Holstein uprising of 1848?

Prussia supported the Schleswig-Holstein uprising of 1848 primarily as a response to the surge of German nationalist sentiment that followed the Revolutions of 1848.12

When the Danish King Frederick VII proposed a constitution that would have integrated the duchies more closely into the Danish state, the German-majority population in Schleswig and Holstein rebelled, seeking independence from Denmark and admission to the German Confederation. Prussia intervened militarily to support these rebels, effectively championing the German nationalist cause to prevent the duchies from being absorbed by Denmark.12

This intervention marked the beginning of the First Schleswig War. While Prussia’s actions were driven by the desire to support German unity and freedom, the conflict was eventually curtailed by pressure from other European powers, leading to a restoration of the status quo under the London Protocol of 1852.12