Why was the Berlin Wall erected in Berlin?

Question

I understand the divide between East and West, but why was the Wall erected specifically in Berlin?

In: Other

Answer 1

The important thing to realise is that Berlin wasn’t on the border between East and West Germany, but was an Enclave deep into East Germany. The only access to West Berlin from the rest of West Germany was a single road through East Germany. This was controlled by East Germany but the East German government allowed West Germans (and other foreign visitors legally in West Germany) free passage along the road.

The border between East and West Germany was secured, patrolled and fenced/walled off, but Berlin had a particularly secure border, because this was a place where escaping to West Germany was very easy simply by walking across.