Once the USA started flying warplanes from Greenland, why didn't merchant ships sail more north, hug Labrador and Greenland for air cover? – history.stackexchange.com
user257486
First, I don't know why Allied land-based air cover from Greenland are missing from both maps?
As soon as USA warplanes combat patrolled from Greenland, why didn't merchant ships sail such route as my ...