Yes, at least, the colonists considered it so. It made it very difficult and expensive for all colonists to get goods.
The battle of Normandy was one of the greatest victories for the Allies. At the start of July 1944, hundreds of thousands of troops swept the Germans at Normandy and kept pushing. They liberated Paris in just about a couple of months at the end of August 1944. Germans would drastically lose control of Europe and surrendered about a year later in 1945.
This excerpt from a letter is a critical primary source, since it was written in the first person and shows the extent to which many patriots during this time were willing to risk their lives for liberty.
Vietnam War is definitely one I'm not sure about the other two though
The Louisiana Territory from Napoleon; half a billion, 3 cents an acre
