Hey kiddo, have you ever heard of the Battle of the Atlantic? It was a big fight that happened during World War II and it took place in the Atlantic Ocean. Let me explain it to you like you're 5 years old.
Picture the ocean as a big playground, with lots of boats and ships playing around in it. During the war, there were two sides - the Allies (who were fighting to stop Germany) and the Axis (which included Germany).
Now imagine that the Axis bullies wanted to stop the Allies from getting supplies and reinforcements to help them win the war. They would try to sink the Allies' ships, like the one carrying the toys and candy you love, with their U-boats (which were like submarines). The U-boats were sneaky and would hide underwater so no one could see them coming.
But the Allies weren't going to let this happen. They sent out big ships called convoys, which were groups of ships that sailed together for protection. The convoys would have warships called escorts, which would try to find and attack the sneaky U-boats before they could sink any of the ships.
This battle went on for years, with both sides trying to outsmart each other. The Allies even came up with some new technology to help them win, like sonar which could detect the U-boats underwater.
In the end, the Allies were able to win the Battle of the Atlantic because they were able to protect their convoys and continue getting supplies and reinforcements to help them win the war.