How does evidence shape Berlin Wall?

Narrative sequence: answer How does evidence shape Berlin Wall by focusing on Part three: Transformation of the Cold War. Use the chronology of BC Conflict and tension between East and West, 1945-1972, select named evidence connected to Study the Berlin Wall, including reasons for its construction and Kennedy's response, and order events accurately, show movement from one development to the next, and avoid jumping chronology. End by answering the command word directly.

This exam-style task requires a developed historical argument rather than a list of facts. Begin with the relevant period from Paper 1 Section B: Wider world depth studies, then anchor the answer in Part three: Transformation of the Cold War. The evidence should connect to Study the Berlin Wall, including reasons for its construction and Kennedy's response and be explained through cause, consequence, change, continuity, significance or interpretation as appropriate. A strong final judgement shows why the selected evidence is more convincing than a vague or unsupported claim.