Potatoes and the Channel Islands (Geurnsey Potato pie)

At the beginning of the film the Nazis are shown confiscating pigs from a farm on Guernsey leaving the farmer to just go potatoes. Jersey royals grown on the neighbouring island are famous globally, I wondered whether the history of growing potatoes on the Channel Iskands stemmed back to being forced to grow them by Nazis.

Looking into, it the history goes back much further. Shipping records from 1537 showing potatoes arriving in the Channel Islands are the first known existence of potatoes outside the Americas.

http://www.sciencemag.org/news/2007/05/secret-history-potato