What are three things you think the expedition probably took with them for their journey into the wilderness

I don't know if there's a particular expedition you're talking about, but for any real expedition, camping trip or day trip into the wilderness and the woods, some of the three main things you'd want to bring would be/could be:

- Tent

- First Aid Kit

- Water Bottle

Some others/optional ones would be:

- Matches

- Sleeping Bag

- Pepper Spray

- Flashlight

- Knife/Pocket Knife