When someone goes away to a dangerous place like war, they might feel really scared and unsure about what will happen. But when they come back home, they feel really happy and relieved to be back with their family and friends. That feeling is called the returning soldier effect! People who experience this effect often have an easier time adjusting back to their normal life after being away for a long time. It's like when you go to sleepover at your friend's house, but then it feels really nice to come back to your own bed and be with all of your own things.