Parliament of the Klaipėda Region
The Parliament of the Klaipėda Region ("Chamber of Representatives of the Memel Territory", ) 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.
1939 German ultimatum to Lithuania
The 1939 German ultimatum to Lithuania was an oral ultimatum which Joachim von Ribbentrop, Foreign Minister of Nazi Germany, presented to Juozas Urbšys, Foreign Minister of Lithuania 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. The Lithuanians had been expecting the demand after years of rising tension between Lithuania and Germany, increasing pro-Nazi propaganda in the region, and continued German expansion. It was issued just five days after the Nazi occupation of Czechoslovakia. The 1924 Klaipėda Convention had guaranteed the protection of the "status quo" in the region, but the four signatories to that convention did not offer any material assistance. The United Kingdom and France followed a policy of appeasement, while Italy and Japan openly supported Germany, and Lithuania was forced to accept the ultimatum on 22 March. It proved to be the last territorial acquisition for Germany before World War II, producing a major downturn in Lithuania's economy and escalating pre-war tensions for Europe as a whole. 
1939 German ultimatum to Lithuania
Klaipėda (German: "Memel"), an important seaport in East Prussia, was detached from Germany by Article 28 of the Treaty of Versailles and was governed by the Allies according to Article 99. France assumed administration of the region while Lithuania continued to lobby for its control, claiming that it should belong to Lithuania as it had a significant Lithuanian population (see Lithuania Minor) and was that country's only access to the Baltic Sea. Poland also laid claim to the territory. As the Allies were hesitant to make a decision and it seemed that the region would remain a free state much like the Free City of Danzig, Lithuania took the initiative and organized the Klaipėda Revolt in January 1923. Soviet Russia and Germany supported the action. The region, as an autonomous territory with its own parliament (Klaipėda Parliament), was attached to Lithuania. The region covered about 2400 km2 and had a population of approximately 140,000.

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