Erich Raeder (24 April 1876 – 6 November 1960) was a naval leader in Germany who played a major role in the naval history of World War II.
 Raeder attained the highest possible naval rank—that of Grand Admiral — in 1939, becoming the first person to hold that rank since Alfred von Tirpitz.
 Raeder led the "Kriegsmarine" for the first half of the war; he resigned in 1943 and was replaced by Karl Dönitz.
 He was sentenced to life in prison at the Nuremberg Trials, but was released early due to failing health.
Erich Johann Albert Raeder (24 April 1876 – 6 November 1960) was a naval leader in Germany before and during World War II.
 Raeder attained the highest possible naval rank—that of "Großadmiral" (Grand Admiral) — in 1939, becoming the first person to hold that rank since Alfred von Tirpitz.
 Raeder led the "Kriegsmarine" (German War Navy) for the first half of the war; he resigned in 1943 and was replaced by Karl Dönitz.
 He was sentenced to life in prison at the Nuremberg Trials, but was released early due to failing health.
 Raeder is also well known for dismissing Reinhard Heydrich from the Reichsmarine in April 1931 for "conduct unbecoming to an officer and a gentleman".
Erich Johann Albert Raeder (24 April 1876 – 6 November 1960) was a naval leader in Germany before and during World War II.
 Raeder attained the highest possible naval rank—that of "Großadmiral" (Grand Admiral) — in 1939, becoming the first person to hold that rank since Alfred von Tirpitz.
 Raeder led the "Kriegsmarine" (German War Navy) for the first half of the war; he resigned in 1943 and was replaced by Karl Dönitz.
 He was sentenced to life in prison at the Nuremberg Trials, but was released early due to failing health.
The military career of Adolf Hitler can be divided into two distinct portions of Adolf Hitler's life.
 Mainly, the period during World War I when Hitler served as a "Gefreiter" (lance corporal) in the Bavarian Army, and the era of World War II when Hitler served as the Supreme Commander-in-Chief of the Wehrmacht (German Armed Forces) through his position as Führer of Nazi Germany.
The Nazi salute or Hitler salute (German: "Hitlergruß" – literally "Hitler Greeting") is a gesture that was used as a greeting in Nazi Germany.
 The salute is performed by extending the right arm from the neck into the air with a straightened hand.
 Usually, the person offering the salute would say ""Heil Hitler!""
 (Hail Hitler!)
, ""Heil, mein Führer!""
 (Hail, my leader!)
, or ""Sieg Heil!""
 (Hail victory!)
.
 It was adopted in the 1930s by the Nazi Party to signal obedience to the party's leader, Adolf Hitler, and to glorify the German nation (and later the German war effort).
 The salute was mandatory for civilians, but was mostly optional for military personnel who retained the traditional military salute until shortly after the failed assassination attempt on Hitler in July 1944.
The Hossbach Memorandum was the summary of a meeting on 5 November 1937 between German dictator Adolf Hitler and his military and foreign policy leadership where Hitler's future expansionist policies were outlined.
 The meeting marked a turning point in Hitler's foreign policies, which then began to radicalize.
 According to the Memorandum, Hitler did not want war in 1939 with Britain and France.
 What he wanted was small wars of plunder to help support Germany's struggling economy.
 The memorandum was named for the keeper of the minutes of the meeting, Hitler's military adjutant, Colonel Count Friedrich Hossbach.
 Besides Colonel Hossbach and Hitler, those attending the meeting were: the Reich Foreign Minister, Baron Konstantin von Neurath; the Reich War Minister, Field Marshal Werner von Blomberg; the Army Commander, General Werner von Fritsch; the Kriegsmarine Commander, Admiral Erich Raeder; and the Luftwaffe Commander, Hermann Göring.
Erich Johann Albert Raeder (24 April 1876 – 6 November 1960) was a naval leader in Germany who played a major role in the Naval history of World War II.
 Raeder attained the highest possible naval rank—that of "Großadmiral" (Grand Admiral) — in 1939, becoming the first person to hold that rank since Alfred von Tirpitz.
 Raeder led the "Kriegsmarine" (German War Navy) for the first half of the war; he resigned in 1943 and was replaced by Karl Dönitz.
 He was sentenced to life in prison at the Nuremberg Trials, but was released early due to failing health.
 Raeder is also well known for dismissing Reinhard Heydrich from the Reichsmarine in April 1931 for "conduct unbecoming to an officer and a gentleman".
Wilhelm Franz Canaris (1 January 1887 – 9 April 1945) was a German admiral and chief of the "Abwehr", the German military intelligence service, from 1935 to 1944.
 Initially a supporter of Adolf Hitler, by 1939 he had turned against the Nazis as he felt Germany would lose another major war.
 During the Second World War he was among the military officers involved in the clandestine opposition to the Nazi regime.
 He was executed in Flossenbürg concentration camp for high treason as the Nazi regime was collapsing.
Erich Johann Albert Raeder (24 April 1876 – 6 November 1960) was a naval leader in Germany before and during World War II.
 Raeder attained the highest possible naval rank—that of "Großadmiral" (Grand Admiral) — in 1939, becoming the first person to hold that rank since Alfred von Tirpitz.
 Raeder led the "Kriegsmarine" (German War Navy) for the first half of the war; he resigned in 1943 and was replaced by Karl Dönitz.
 He was sentenced to life in prison at the Nuremberg Trials, but was released early due to failing health.
 Raeder is also well known for dismissing Reinhard Heydrich from the Reichsmarine in April 1931 for "conduct unbecoming to an officer and a gentleman".
Karl Dönitz (sometimes spelt Doenitz) (] ; 16 September 1891 – 24 December 1980) was a German admiral who played a major role in the naval history of World War II.
 Dönitz briefly succeeded Adolf Hitler as the head of state of Germany.

Question: Which German admiral in World War II replaced Erich Johann Albert Raeder as leader of the German War Navy and also briefly succeeded Adolf Hitler?
Answer: Karl Dönitz.