Question: Durring what war was the "U-1304" used by the navy of Nazi Germany from 1935 to 1945.?

Context articles: Unterfeldwebel
Schutzstaffel
Allied-occupied Germany
Nazi Germany
Mass suicides in 1945 Nazi Germany
Kriegsmarine
German submarine U-1304
Gau Eastern Hanover
Wehrmacht
Catholic bishops in Nazi Germany

Unterfeldwebel (lit.
 "Under Field Sergeant") Was a rank of the East German National People's Army from 1956 to 1990.
 It was also used in the armed forces of Nazi Germany, the Wehrmacht, from 1935 until 1945, when Nazi Germany was defeated in The Second World War.
 The equivalent to "Unterfeldwebel" in the Bundeswehr of West Germany and later the Federal Republic of Germany is the rank Stabsunteroffizier (OR-5).
The Schutzstaffel (SS; also stylized as with Armanen runes; ] ; literally "Protection Squadron") was a major paramilitary organization under Adolf Hitler and the Nazi Party (NSDAP) in Nazi Germany, and later throughout German-occupied Europe during World War II.
 It began with a small guard unit known as the "Saal-Schutz" (Hall-Protection) made up of NSDAP volunteers to provide security for party meetings in Munich.
 In 1925, Heinrich Himmler joined the unit, which had by then been reformed and given its final name.
 Under his direction (1929–45), it grew from a small paramilitary formation to one of the most powerful organizations in Nazi Germany.
 From 1929 until the regime's collapse in 1945, the SS was the foremost agency of security, surveillance, and terror within Germany and German-occupied Europe.
Upon the defeat of Nazi Germany in World War II, the victorious Allied powers asserted their joint authority and sovereignty over 'Germany as a whole', defined as all territories of the former German Reich which lay west of the Oder–Neisse line; having declared the extinction of Nazi Germany at the death of Adolf Hitler (see 1945 Berlin Declaration).
 The four powers divided 'Germany as a whole' into four occupation zones for administrative purposes, creating what became collectively known as Allied-occupied Germany (German: "Alliierten-besetztes Deutschland" ).
 This division was ratified at the Potsdam Conference (17 July to 2 August 1945).
 In autumn 1944 the United States, United Kingdom and Soviet Union had agreed on the zones by the London Protocol.
 The powers at Potsdam approved the detachment from 'Germany as a whole' of the German eastern territories east of the Oder-Neisse line; with the exact line of the boundary to be determined at a final German Peace Treaty.
 This treaty was expected to confirm the "shifting westward" of Poland's borders (back to approximately as they were before 1722), as the United Kingdom and the United States committed themselves to support there the permanent incorporation of former eastern German territories into Poland and the Soviet Union.
 In the closing weeks of fighting in Europe, United States forces had pushed beyond the agreed boundaries for the future zones of occupation, in some places by as much as 200 mi .
 The so-called line of contact between Soviet and American forces at the end of hostilities, mostly lying eastward of the July 1945-established inner German border was temporary.
 After two months in which they had held areas that had been assigned to the Soviet zone, U.S. forces withdrew in the first days of July 1945.
 Some have concluded that this was a crucial move that persuaded the Soviet Union to allow American, British and French forces into their designated sectors in Berlin, which occurred at roughly the same time (July 1945), although the need for intelligence gathering (see Operation Paperclip) may also have been a factor.
Nazi Germany is the common English name for the period in German history from 1933 to 1945, when Germany was governed by a dictatorship under the control of Adolf Hitler and the Nazi Party (NSDAP).
 Under Hitler's rule, Germany was transformed into a totalitarian state in which the Nazi Party controlled nearly all aspects of life.
 The official name of the state was "Deutsches Reich" from 1933 to 1943 and "Großdeutsches Reich" ("Greater German Reich") from 1943 to 1945.
 The period is also known under the names the Third Reich (German: "Drittes Reich" ) and the National Socialist Period (German: "Zeit des Nationalsozialismus" , abbreviated as "NS-Zeit").
 The Nazi regime came to an end after the Allied Powers defeated Germany in May 1945, ending World War II in Europe.
During the final weeks of the Third Reich and the war in Europe, many civilians, government officials and military personnel throughout Nazi Germany committed suicide.
 Aside from high-ranking Nazi officials like Adolf Hitler, Joseph Goebbels, Heinrich Himmler, Philipp Bouhler and Martin Bormann, many others chose " Selbstmord" (German: "Self-murder" ) rather than accept the defeat of Germany.
 Studies have shown that the suicides were influenced through Nazi propaganda (reaction to the suicide of Adolf Hitler), the tenets of the Nazi Party, and the anticipated reprisals following the Allied occupation of Nazi Germany.
 For example in April 1945, at least 1,000 people killed themselves and others within 72 hours as the Red Army neared the East German town of Demmin.
The Kriegsmarine (] , "War Navy") was the navy of Nazi Germany from 1935 to 1945.
 It superseded the Imperial German Navy of the German Empire and the inter-war "Reichsmarine".
 The "Kriegsmarine" was one of three official branches, along with the "Heer (Army)" and the "Luftwaffe (Air Force)", of the Wehrmacht, the armed forces of Nazi Germany.
German submarine "U-1304" was a Type VIIC/41 U-boat of Nazi Germany's "Kriegsmarine" during World War II.
Gau Eastern Hanover (German: "Osthannover") was a regional district of the NSDAP established in 1925 in the north eastern part of the Prussian Province of Hanover, comprising the governorates of Stade and Lunenburg in their then boundaries.
 Initially the Gau was a mere regional Nazi party subsection, but with the growing subjection of all public administration to Nazi party influence after the Machtergreifung, the Gau usurped from 1933 to 1935 more and more the functions of the Provincial government and its superordinate Free State of Prussia.
 However, after the German constituent states were de facto abolished in 1935, the Gaue replaced them in their responsibilities.
 Gau East Hannover - like all Nazi party structures - was dismantled after Nazi Germany's defeat in 1945.
 In 1946 the Control Commission for Germany - British Element (CCG/BE) reconstituted the Province of Hanover as the State of Hanover and later the same year it merged with three smaller neighbouring reconstituted German states to form the new state of Lower Saxony within the British Zone of Occupation.
 The municipality of Amt Neuhaus was allocated to Mecklenburg-Vorpommern.
The Wehrmacht (] , lit.
 "defence force") was the unified armed forces of Nazi Germany from 1935 to 1946.
 It consisted of the "Heer" (army), the "Kriegsmarine" (navy) and the "Luftwaffe" (air force).
 The designation "Wehrmacht" for Nazi Germany's military replaced the previously used term, "Reichswehr" (1919–35), and was the manifestation of Nazi Germany's efforts to rearm the nation to a greater extent than the Treaty of Versailles permitted.
Catholic bishops in Nazi Germany differed in their responses to the rise of Nazi Germany, World War II, and the Holocaust during the years 1933–1945.
 In the 1930s, the Episcopate of the Catholic Church of Germany comprised 6 Archbishops and 19 bishops while German Catholics comprised around one third of the population of Germany served by 20,000 priests.
 In the lead up to the 1933 Nazi takeover, German Catholic leaders were outspoken in their criticism of Nazism.
 Following the Nazi takeover, the Catholic Church sought an accord with the Government, was pressured to conform, and faced persecution.
 The regime had flagrant disregard for the Reich concordat with the Holy See, and the episcopate had various disagreements with the Nazi government, but it never declared an official sanction of the various attempts to overthrow the Hitler regime.
 Ian Kershaw wrote that the churches "engaged in a bitter war of attrition with the regime, receiving the demonstrative backing of millions of churchgoers.
 Applause for Church leaders whenever they appeared in public, swollen attendances at events such as Corpus Christi Day processions, and packed church services were outward signs of the struggle of ... especially of the Catholic Church - against Nazi oppression".
 While the Church ultimately failed to protect its youth organisations and schools, it did have some successes in mobilizing public opinion to alter government policies.