A lot of non-fiction books and newspaper articles make references to various WWII operations, and post WWII operations. But what do they refer to? Here is a guide:
Operation Barclay: This was part of the Operation Mincemeat and various other means to convince the Germans that the allies were invading Greece and Sardinia.
Operation Mincemeat: A plan to convince the Germans that the allies were invading Greece and Sardinia, instead of Sicily.
Operation Overlord: The invasion of Normandy by the Allied forces.
Operation Paperclip: A plan by both the USA and the USSR to recruit German scientists after WWII.
Operation Sea Lion: The plan of the Germans to invade Britain, which lead to the Battle of Britain.
Operation Z: The attack on Pearl Harbor.