This will give you peace of mind, in that you can verify whether or not a professor has submitted a letter. It also gives you a polite way to ask a follow-up: I see that you haven't checked off the spreadsheet for X and it's due in three days.
Of the nearly 200 countries out there, the Brits have invaded all but 22. That is just about 90% of all countries! Mongolia, the Ivory Coast, Bolivia and Sweden are among the selective group of making it to 2013 without a British invasion. Here is the map showing where (pink) the British have invaded.
1940: Dunkirk evacuation, Operation Sealion & the Battle of Britain. Nazi Germany invades France May 1940. War was declared between Nazi Germany and the allies Britain and France in September 1939, when Hitler invaded Poland. As in 1914, Britain sent an army to help defend France against the expected Geramn invasion.