War can be a very spiritual experience. It's really very, very different from what most people who've never experienced war consider it to be. It's nothing like in the movies. It's not exciting or glamorous.
War is first and foremost very boring. You generally spend most of your time locked away in a basement or bomb shelter. You'll spent at least 20 hours of every day in hiding, since it's generally not safe to venture outside and you're only willing to do so when absolutely necessary. There's no electricity, and if by some miracle it does return you use it in a mad rush to cook things that need to be cooked, not to watch television, or browse the internet, or whatever else.
If you're lucky, you have some other people with you - or perhaps some books, something of this nature. Basements in major apartment highrises often have the atmosphere of a kitchen party as dozens of families crowd around the old boiler rooms and whatever else. Someone will play some music, others will sing, someone will have a battery-powered radio to listen to the news. You can almost forget it's a war and it becomes very addictive.
But you'll be reminded. Everyday someone has to go out to search for water, food, and whatever else people need. Sooner or later not everyone who goes out returns, and then it's difficult for a few days. Sometimes the bombings come very close and dust falls from the ceiling of the basement as the building above is hit. These are the times when it's terrifying - you worry about being burned alive, or worse, burried alive.
So the actual experience of war is 90% deathly boredom, 5% fun companionship, and 5% horror.
The latter 10% can be very spiritual. When people say they love you, they mean it. When people pray, they mean it. When people are in danger, they reach out for all sorts of things - including faith. I can remember bombings where we hid under a table - as if that would offer any protection? And you read all the time about people holding whatever was in their hand - perhaps papers - over their head while running across sniper zones. It's just foolish what people need, it reminds me of the quote, "I imagine I'd have felt safer with a lace curtain around me than without one."
But it makes you more devout, generally. It certainly has a spiritual effect.