Article says Western Europe, but Norway is in Northern Europe.
“First rocket to launch from Europe outside Russia” would have been perfectly correct.
In the political sense, «Western Europe» is typically taken to be «NATO Europe», and «Eastern Europe» is «Warsaw Pact Europe». Which is different from a strict geographic definition.
In the political sense, «Western Europe» is typically taken to be «NATO Europe», and «Eastern Europe» is «Warsaw Pact Europe». Which is different from a strict geographic definition.