Question: A naval leader in Germany before and during World War II  attained the highest possible naval rank since who, was later replaced by  the man who briefly succeeded Adolf Hitler as the head of state of Germany?
Sentence (from "German–Soviet Axis talks"): The negotiations, which occurred during the era of the Molotov–Ribbentrop Pact, included a two-day Berlin conference between Soviet Foreign Minister Vyacheslav Molotov, Adolf Hitler and German Foreign Minister Joachim von Ribbentrop, followed by both countries trading written proposed agreements.
Relevant evidence: No