I'm Germany and sent two Infantry into Amsterdam against a single armored car. I thought I'd win, and I knew I'd take a few casualties, but as I was monitoring the situation, some attacks wouldn't do any damage to my opponent but damage me. It confused me a lot. I went to bed and woke up, and my troops were gone and their armored car was at 11%. Here's the thing. When I went to bed, I their armored car was at 21% and my single remaining troops was around 50%. How did mine die and his didn't?
To build, you must first destroy.