Question: The Parliament of the Klaipėda Region was disbanded after an ultimated was issued just five days after what?

Context paragraphs:
Heinrich Buttkereit: Heinrich Buttkereit (1884–1947) was an ethnic German politician in Lithuania.  Buttkereit was born on April 23, 1884 in Ruß.  He was a farmer from Ruß.  In the 1932 election to the parliament of the Klaipėda Region, he stood as candidate number 26 on the list of the Memel Agricultural Party.  He was not elected in 1932, but on September 13, 1934 he filled one of seats in the assembly that had been left vacant.  He remained a member of the regional parliament until the 1935 elections.

Klaipėda Revolt: The Klaipėda Revolt took place in January 1923 in the Klaipėda Region (Memel Territory, Memelland).  The region, located north of the Neman River, was detached from East Prussia, Germany by the Treaty of Versailles and became a mandate of the League of Nations.  It was placed under provisional French administration until a more permanent solution could be worked out.  Lithuania wanted to unite with the region (part of Lithuania Minor) due to its large Lithuanian-speaking minority of Prussian Lithuanians and major port of Klaipėda (Memel) – the only viable access to the Baltic Sea for Lithuania.  As the Conference of Ambassadors favored leaving the region as a free city, similar to the Free City of Danzig, the Lithuanians organized and staged a revolt.

Šilutė: Šilutė ( , previously "Šilokarčiama", German: "Heydekrug" ) is a city in the south of the Klaipėda County, Lithuania.  The city was part of the Klaipėda Region and ethnographic Lithuania Minor.  Šilutė was the interwar capital of Šilutė County and is currently the capital of Šilutė District Municipality.

Parliament of the Klaipėda Region: The Parliament of the Klaipėda Region ("Chamber of Representatives of the Memel Territory", Lithuanian: "Seimelis" ) was the parliament of the Klaipėda Region (Memel Territory), an autonomous region of Lithuania.  The parliament was established by the Klaipėda Convention of 1924 and the first elections took place in October 1925.  In all elections pro-German parties received more than 80% of the vote.  The major parties included the Memel Agricultural Party ("Memelländische Landwirtschaftspartei" or MLP), Memel People's Party ("Memelländische Volkspartei" or MVP), and Social Democratic Party of the Memel Territory ("Sozialdemokratische Partei des Memelgebietes" or SPM).  The pro-German parliament often clashed with the pro-Lithuanian Klaipėda Directorate (executive branch of local government) and the first three parliaments were dismissed before the end of their full three-year term.  The parliament was disbanded after the ultimatum of March 1939 and subsequent Nazi German takeover of the region.

Erdmonas Simonaitis: Erdmonas Simonaitis (October 30, 1888 in Juschka-Spötzen (Spiečiai), Province of East Prussia – February 24, 1969 in Weinheim, West Germany) was a Prussian Lithuanian activist particularly active in the Klaipėda Region (Memel Territory) and advocating its union with Lithuania.  During the staged Klaipėda Revolt of 1923, he headed the pro-Lithuanian government of the region.  For his anti-German activities, he was persecuted by the Nazis during World War II.  He survived the Mauthausen-Gusen and Dachau concentration camps.  After the war he remained in Germany and rejoined various Lithuanian organizations.  He was awarded the Order of Vytautas the Great and Order of the Lithuanian Grand Duke Gediminas.

Directorate of the Klaipėda Region: The Directorate of the Klaipėda Region (German: "Landesdirektorium" ; Lithuanian: "Klaipėdos krašto direktorija" ) was the main governing institution (executive branch) in the Klaipėda Region (Memel Territory) from February 1920 to March 1939.  It was established by local German political parties to govern the region between the signing of the Treaty of Versailles and establishment of French provision administration.  Instead of replacing it, the French legitimized the Directorate.  It mainly represented German interests and supported the idea of leaving the region as a free city, similar to the Free City of Danzig.  Dismayed Lithuanian government and Prussian Lithuanian activists, who campaigned for incorporation into Lithuania, organized the Klaipėda Revolt in January 1923.  The revolt was staged as a popular uprising against the unbearable oppression by the German Directorate.  The revolt was successful and the region was incorporated into Lithuania as an autonomous region, governed by the Klaipėda Convention of May 1924.

Memel People's Party: The Memel People's Party or MVP (German: "Memelländische Volkspartei" , Lithuanian: "Klaipėdos krašto tautos partija" ) was a pro-German political party in the Klaipėda Region (Memel Territory), autonomous region of Lithuania, from 1925 to 1938.  Together with the Memel Agricultural Party, the party was established on June 13, 1925, by the Memel Cultural Union ("Memelländischer Kultubund") in preparation for the first elections to the local county councils and the Parliament of the Klaipėda Region.  The party leaders were Joseph Kraus, Richard Meyer, Robert Grabow.  MVP represented mainly industrialists, merchants, craftsmen, clerks, city dwellers.  The party received funding from Germany and was able to provide no-interest loans to its members, gaining significant influence in the region.  MVP published newspaper "Memeler Dampfboot".  In May 1926, the party won two seats (out of 85) in the Third Seimas of Lithuania (representatives Robert Grabow and Max Jackstaidt).  After the Nazi seizure of power in Germany in 1933, MVP lost its funding from Germany and began losing its members to the pro-Nazi Socialist National Community ("Sozialistische Volksgemeinschaft" or SOVOG) and Christian-Socialist Workers Community ("Christlich-Sozialistische Arbeitsgemeinschaft" or CSA).  Some of the MVP activists retreated to Germany, others were arrested and tried for their anti-Lithuanian activities in the Neumann–Sass case.  The weakened party ran in later elections under the unified German list ("Memelländische Einheitsliste" in 1935 and "Memeldeutsche Einheitsliste" in 1938).  Its activities largely ceased of the 1938 elections.

1939 German ultimatum to Lithuania: 1939 German ultimatum to Lithuania was an oral ultimatum presented to Juozas Urbšys, Foreign Minister of Lithuania, by Joachim von Ribbentrop, Foreign Minister of Nazi Germany, on 20 March 1939.  The Germans demanded that Lithuania give up the Klaipėda Region (also known as the Memel Territory), which had been detached from Germany after World War I, or the Wehrmacht would invade Lithuania.  After years of rising tension between Lithuania and Germany, increasing pro-Nazi propaganda in the region, and continued German expansion, the demand was expected.  The ultimatum was issued just five days after the Nazi occupation of Czechoslovakia.  The four signatories of the 1924 Klaipėda Convention, which had guaranteed the protection of the "status quo" in the region, did not offer any material assistance.  The United Kingdom and France followed a policy of appeasement, while Italy and Japan openly supported Germany.  Lithuania was forced to accept the ultimatum on 22 March.  For Germany it was the last territorial acquisition before World War II; for Lithuania it was a major downturn in economy and morale; for Europe it was further escalation in pre-war tensions.

Klaipėda Convention: The Klaipėda Convention (or Convention concerning the Territory of Memel) was an international agreement between Lithuania and the countries of the Conference of Ambassadors (United Kingdom, France, Italy, and Japan) signed in Paris on May 8, 1924.  According to the Convention, the Klaipėda Region (Memel Territory) became an autonomous region under unconditional sovereignty of Lithuania.

Memel Agricultural Party: Memel Agricultural Party or MLP (German: "Memelländische Landwirtschaftspartei" ) was the largest and most influential pro-German political party in the Klaipėda Region (Memel Territory) from 1925 to 1934.  Leaders of the party were Heinrich Conrad, Konrad von Dressler and James Gubba.  Together with the Memel People's Party, the party was established on June 13, 1925, by the Memel Cultural Union ("Memelländischer Kultubund") in preparation for the first elections to the local county councils and the Parliament of the Klaipėda Region.  The party represented farmers, war veterans, fishermen, and some clerks.  It published "Memel Rundschau", "Lietuviška ceitunga", "Memeler Dampfboot" and controlled several agricultural and credit institutions, including "Agraria", "Landschaftsbank", "Vereinsbank", and "Raiffeisenbank".  MLP was able to offer discounts to its members and thus gained significant influence in the region.  In May 1926, the party won three seats (out of 85) in the Third Seimas of Lithuania (August Mielbrecht, Johann Schuischel and Georg Waschkies).  After the Nazi seizure of power in Germany in 1933, MLP became increasingly right-wing and encouraged its members to join the pro-Nazi Socialist National Community ("Sozialistische Volksgemeinschaft" or SOVOG).  For their anti-Lithuanian activities SOVOG and MLP were outlawed in 1934.  Some of MLP members were arrested and tried in the Neumann–Sass case.  The party ceased its activities; its former members ran in later elections under the unified German list ("Memelländische Einheitsliste" in 1935 and "Memeldeutsche Einheitsliste" in 1938).

Supporting paragraphs: Parliament of the Klaipėda Region 1939 German ultimatum to Lithuania
Answer: the Nazi occupation of Czechoslovakia