Okay kiddo, so you know how sometimes people don't get along and they might argue or even fight with each other? Well, that's kind of what's happening between Israel and the Gaza Strip.
The Gaza Strip is a tiny area of land near the Mediterranean Sea that's home to a lot of Palestinian people. They don't like the way Israel has been treating them, and sometimes they'll protest or even send rockets into Israel.
When Israel feels threatened or attacked, they might respond with military action. This can mean launching bombs or missiles into the Gaza Strip. Unfortunately, when those bombs or missiles hit, they can hurt or kill innocent people who were just going about their lives.
That's what we call casualties of the Israeli attacks on the Gaza Strip. It means people who didn't do anything wrong, but were hurt or killed because of the fighting between Israel and the Palestinians. It's a very sad and scary situation, and we hope that one day everyone can find a way to get along and live in peace.