Escape and evasion lines (World War II)

Escape and evasion lines in World War II helped people escape European countries occupied by Nazi Germany. The focus of most escape lines in Western Europe was assisting American, British, Canadian and other Allied airmen shot down over occupied Europe to evade capture and escape to neutral Spain or Sweden from where they could return to the United Kingdom.

Source: Wikipedia — Escape and evasion lines (World War II) (CC BY-SA 4.0)