Second Schleswig War

The 1864 war in which Prussia and Austria defeated Denmark over Schleswig and Holstein, ending Danish rule in the duchies and reshaping German and Danish politics.

Danish November Constitution: Denmark's 1863 constitution tied Schleswig more closely to the kingdom while excluding Holstein. Its extension to Schleswig gave Prussia and Austria a stated basis for intervention.
Schleswig-Holstein Question: A nineteenth-century dispute over the constitutional status and national allegiance of Schleswig and Holstein. The war was a major armed phase of this long-running dispute.
Otto von Bismarck: The Prussian statesman who served as minister-president from 1862 and later unified Germany under Prussian leadership. He used cooperation with Austria to isolate Denmark and secure Prussian influence.
Gastein Convention: An 1865 agreement that placed Schleswig under Prussian administration and Holstein under Austrian administration. The joint administration created fresh friction after the victors divided control.
German Confederation: A loose association of German states that existed from 1815 to 1866. The duchies' disputed status within the Confederation shaped the powers' intervention.
First Schleswig War: The 1848–1851 conflict between Denmark and German forces over Schleswig and Holstein. Its unresolved settlement left the duchies' relationship to Denmark contested.
Christian IX of Denmark: King of Denmark from 1863 to 1906, whose accession coincided with the November Constitution crisis. His assent to the constitution helped trigger the powers' intervention.
Austro-Prussian War: The 1866 war in which Prussia defeated Austria and its allies for leadership among the German states. The unresolved administration of the duchies helped precipitate this conflict.
Battle of Dybbøl: The decisive 18 April 1864 Prussian assault on Danish fortifications at Dybbøl. Its capture opened the way for Prussia's advance into Jutland.
London Protocol of 1852: An international agreement that affirmed the Danish monarchy's succession while addressing the duchies' position. Its guarantees became central to arguments over Denmark's constitutional changes.

Linked from 16 pages