Question: When was Herbert Blöcker's native province captured by Prussia and the Austrian Empire?

Context paragraphs:
List of monarchs of Prussia: The monarchs of Prussia were members of the House of Hohenzollern who were the hereditary rulers of the former German state of Prussia from its founding in 1525 as the Duchy of Prussia.  The Duchy had evolved out of the Teutonic Order, a Roman Catholic crusader state and theocracy located along the eastern coast of the Baltic Sea.  The Teutonic Knights were under the leadership of a Grand Master, the last of whom, Albert, converted to Protestantism and secularized the lands, which then became the Duchy of Prussia.  The Duchy was initially a vassal of the Kingdom of Poland, as a result of the terms of the Prussian Homage whereby Albert was granted the Duchy as part of the terms of peace following the Prussian War.  When the main line of Prussian Hohenzollerns died out in 1618, the Duchy passed to a different branch of the family, who also reigned as Electors of Brandenburg in the Holy Roman Empire.  While still nominally two different territories, Prussia under the suzerainty of Poland and Brandenburg under the suzerainty of the Holy Roman Empire, the two states are known together historiographically as Brandenburg-Prussia.  Following the Second Northern War, a series of treaties freed the Duchy of Prussia from any vassalage to any other state, making it a fully sovereign Duchy in its own right.  This complex situation (where the Hohenzollern ruler of the independent Duchy of Prussia was also a subject of the Holy Roman Emperor as Elector of Brandenburg) laid the eventual groundwork for the establishment of the Kingdom of Prussia in 1701.  For diplomatic reasons, the rulers of the state were known as the King in Prussia from 1701 to 1772; largely because they still owed fealty to the Emperor as Electors of Brandenburg, the "King in Prussia" title (as opposed to "King of Prussia") avoided offending the Emperor.  As the Prussian state grew through several wars and diplomatic moves throughout the 18th century, it became apparent that Prussia had become a Great Power that did not need to submit meekly to the Holy Roman Empire.  By 1772, the pretense was dropped, and the style "King of Prussia" was adopted.  Thus it remained until 1871, when in the aftermath of the Franco-Prussian War, the King of Prussia Wilhelm I was crowned German Emperor.  From that point forward, though the Kingdom of Prussia retained its status as a constituent state of the German Empire, all remaining Kings of Prussia also served as German Emperor, and that title took precedence.

Austrian literature: Austrian literature is the literature written in Austria, which is mostly, but not exclusively, written in the German language.  Some scholars speak about Austrian literature in a strict sense from the year 1806 on when Francis II disbanded the Holy Roman Empire and established the Austrian Empire.  A more liberal definition incorporates all the literary works written on the territory of today's and historical Austria, especially when it comes to authors who wrote in German.  Thus, the seven volume history of Austrian literature by the editors Herbert Zeman and Fritz Peter Knapp is titled "History of the Literature in Austria".  The Austrian literature must be considered in close connection with German literature in general, and the borderline between proper German literature and the Austrian one is porous, due to rich and complex cultural exchanges.

Franz Stadion, Count von Warthausen: Franz Stadion, Graf von Warthausen (27 July 1806 – 8 June 1853), son of the Austrian diplomat Johann Philipp von Stadion.  Born in Vienna, he was a statesman who served the Austrian Empire during the 1840s.  From 1841 he was Governor of the Austrian Littoral (with its capital at Trieste), from 1847 to 1848 Governor of Galicia (where he freed the peasants from labor duties), and from 1848 to 1849 he was Interior Minister and Minister of Education.  He advocated constitutional government, decreed the Imposed March Constitution in March 1849 which was never enacted, and in 1849 promulgated the "Gemeinde" (municipality) legislation that granted governmental autonomy to all municipalities in the Austrian empire.  Lewis Namier, in "1848: The Revolution of the Intellectuals" (p. 18), calls him "one of the most enlightened and efficient Austrian administrators."

Austro-Polish War: The Austro-Polish War or Polish-Austrian War was a part of the War of the Fifth Coalition in 1809 (a coalition of the Austrian Empire and the United Kingdom against Napoleon's French Empire and Bavaria).  In this war, Polish forces of the Napoleon-allied Duchy of Warsaw and assisted by forces of the Kingdom of Saxony, fought against the Austrian Empire.  By May, the Russian Empire joined against Austria.  Polish troops withstood the Austrian attack on Warsaw defeating them at Raszyn, then abandoned Warsaw in order to reconquer parts of pre-partition Poland including Kraków and Lwów, forcing the Austrians to abandon Warsaw in futile pursuit.

Herbert Blöcker: Herbert Blöcker (January 1, 1943 – February 15, 2014) was a German equestrian and 3-time Olympic medalist.  He was born in Schleswig-Holstein.  He won a silver medal at the Olympics in Fontainebleau in 1980 following by winning another silver in eventing at the 1992 Summer Olympics in Barcelona.  During the same Olympic event he won a bronze medal too and then participated in the 1996 Summer Olympics in Atlanta, Georgia.  In 2008, both he and his Olympic horse, "Feine Dame", were inducted into the International Association of Eventing Hall of Fame.  Blöcker died of cancer on February 15, 2014 at the age of 71 in Elmshorn.

Province of Schleswig-Holstein: The Province of Schleswig-Holstein (German: "Provinz Schleswig-Holstein" , ] ) was a province of the Kingdom of Prussia and the Free State of Prussia from 1868 to 1946.  It was created from the Duchies of Schleswig and Holstein, which had been conquered by Prussia and the Austrian Empire from Denmark in the Second War of Schleswig in 1864.  Following the Austro-Prussian War in 1866, which ended in Austrian defeat, Schleswig and Holstein were annexed by Prussia.  The province was created in 1868 and also included the Duchy of Lauenburg since 1876.

West Prussia: The Province of West Prussia (German: "Provinz Westpreußen" ; Kashubian: "Zôpadné Prësë" ; Polish: "Prusy Zachodnie" ) was a province of the Kingdom of Prussia from 1773 to 1824 and again from 1878 (with the Kingdom itself being part of the German Empire from 1871); it also briefly formed part of the Weimar Republic's Free State of Prussia until 1919/20.  It was created out of the earlier Polish province of Royal Prussia following the First Partition of Poland.  In February 1920, following Germany's defeat in 1918, West Prussia was divided: the mainly Slavic-speaking central parts became the Pomeranian Voivodeship of the Second Polish Republic, also known as the Polish Corridor; the city of Danzig became the Free City of Danzig, a semi-autonomous city-state under the protection of the League of Nations; the remaining territory was retained by the Free State of Prussia/Weimar Republic, with the western parts being joined to what remained of the former Province of Posen to form the new Posen-West Prussia Province, and the eastern parts being joined to the Province of East Prussia as Regierungsbezirk West Prussia.  The territory was included within Reichsgau Danzig-West Prussia 1939–45, after which it became part of Poland.

Áron Gábor: Áron Gábor, born on 27 November 1814, Bereck, Transylvania, Austrian Empire (now Brețcu, Covasna county, Romania) - died on 2 July 1849, Kökös, Transylvania, Austrian Empire (now Chichiș, Covasna county, Romania) was a Székely Hungarian artillery officer and national hero of the 1848-49 Hungarian Revolution.  He became one of the leaders of Székely-Hungarian forces in Transylvania during the 1848 revolution against the Austrian Empire.  He achieved fame and notoriety by successfully producing cannon and gunpowder for the Hungarian forces in Transylvania, as well as, leading the resistance in Háromszék County (today corresponding roughly to Covasna County, Romania) against imperial troops.  He was killed in action in July 1849 while fighting against the Tsarist invading forces.

Austro-German Postal Union: The Austro-German Postal Union (Deutsch-Österreichischer Postverein, literally "German–Austrian Postal Association") was a union of the postal systems of the Austrian Empire and the pre-Empire German states.  The union was established on July 1, 1850.  The administrative prerequisites were already provided by the German Zollverein established in 1834.  On October 18, 1847 the representatives convened to the German Postal Conference in Dresden on a suggestion of Prussia and Austria.  Not until April 6, 1850 Prussia and Austria, slowed down by political circumstances, closed a contract establishing a German–Austrian Postal Association in Berlin.

Treaty of the Three Black Eagles: The Treaty of the Three Black Eagles (because all three signatories used a black eagle as a state symbol, in contrast to the white eagle, a symbol of Poland) or the Treaty of Berlin (where it was signed by Prussia), was a secret treaty between the Austrian Empire, the Russian Empire and Prussia.  Signed between Russia and Austria on 13 September 1732 and joined by Prussia on 13 December that year, it concerned the joint policy of those three powers in regard to the succession of the Polish throne in light of the expected death of the Augustus II of Poland (of the Saxon House of Wettin) and the Polish custom of royal elections.  The three powers agreed that they would oppose another candidate from the House of Wettin, as well as the candidacy of the pro-French Pole Stanisław Leszczyński, father-in-law of Louis XV.  Instead, they chose to support either Infante Manuel, Count of Ourém, brother of the Portuguese king, or a member of the Piast family.

Supporting paragraphs: Herbert Blöcker Province of Schleswig-Holstein
Answer: 1864