That's a huge question. I suggest you get your hands on "The Longest Day" by Cornelius Ryan, which is the best starting place to understand the Normandy invasion. From there, go on to "D-Day," by Stephen Ambrose and "D-Day: Voices From Normandy" by Robin Neillands. Also excellent is "Nothing Less Than Victory: An Oral History of D-Day."
Mongol invasions of Japan happened in 1274.
Hungarian invasions of Europe happened in 800.
Mongol invasions of Tibet happened in 1240.
Mongol invasions of Vietnam happened in 1257.
Mongol invasions of Korea happened in 1231.
Crusader invasions of Egypt happened in 1154.
Mongol invasions of Syria happened in 1260.
Caesar's invasions of Britain happened in -54.
Cao Pi's invasions of Eastern Wu happened in 222.
British invasions of the Río de la Plata happened in 1806.
After many invasions during the history, many wars and plunderings the people adopt the name Romanian, probably around the year 800.
There was a boycott duw tooo invasions of afghanistan