Calypso keeps Odysseus captive on her island for about 10 years
I think a good thing to make a reference to with a war story is compare it to a modern day war story. I think Odysseus arriving on Calypso's island can be compared to soldiers storming in on any land mass. I think a good example of this is the storming of Normandy Beach on Doomsday.
Hermes comes and tells Calypso to let him go, and she obeys
Because we are doing war references of WWII I say that this scene can make a reference to the U.S. launching an assault on the German troops. They were at war from the beginning and this is actually fighting war, but Calypso held Odysseus captive for years and made him miserable. Just as the soldiers lives were miserable at that beach.
Odysseus sets sail through troubled water but eventually gets help to make it home.
Calypso held Odysseus captive for about ten years but overall WWII lasted for six years. Many years of miserable fighting and being in places and situations that people or Odysseus did not want to be in. It was brutal. But many like Odysseus in WWII persevered and made it through and kept on fighting until the German forces were defeated.
Odysseus returns home
Just as Odysseus had received help from Hermes that day our soldiers receive help in any battle that they are in. They have communication and whenever they go into battle they do not only have the front line fight. They have backup too. And just like Calypso let Odysseus go the Germans signed the treaty and their wars were over.
After the wars, everybody wants to come home. However that is, via airplane, army vehicle, or boat they want to get home and reunite with their family and friends when the fighting is over. So they go home.
I think the best example of Odysseus coming home compared to our army soldiers. They risk their lives to protect their country and they know that they might die or take serious injuries. But if they beat the odds and survive they get to come home in a reunion.