German invasion of Greece - Wikipedia

History of Greece - Wikipedia

Battle of Greece - New World Encyclopedia

Greco-Italian War - Wikipedia

File:2-2 Battalion soldiers in Northern Greece during the retreat from the German invasion.jpg - Wikipedia

Battle of Korytsa - Wikiwand

Battle of Crete - Wikipedia

Battle of Crete - Wikipedia

Invasion of Yugoslavia - Wikipedia

Axis occupation of Greece - Wikipedia

Battle of Crete - Wikipedia

Military history of Greece during World War II - Wikipedia

Axis occupation of Greece - Wikipedia

Why did Greece have such a huge number of losses in human lives during the WW2 compared to its dimensions of a small country? - Quora