Welcome to FlyerTalk, lauraallover. You've come to the right place to have these questions answered. You'll have a great trip!

The tickets are likely already booked. There's no such thing as a paper ticket anymore -- at the airport, you'll get a boarding pass for each separate flight. Your tickets are stored in the airlines' computer and all your different flights are linked to the confirmation number the Army gave you.

However, and this is important: You should ask the Army for all the details -- the name of the airline operating each of your flights, all the flight numbers, and each flight's departure & arrival times. I'm worried because you said you're flying Delta from Southern Indiana to Chicago, but Delta does not fly that route. Maybe you're flying Delta to Detroit? or American to Chicago?

As people have already said, there will be a gate number printed on each of your boarding passes. But sometimes those gates change, so make sure you check the TV monitors in each airport after you arrive to make sure. It's no problem to find the gate. Each airport has plenty of signs showing you where to go, and there are lots of airline employees to ask if you get lost.

The only airline that flies from Seoul to Daegu is Korean Air. According to their website, your luggage will only go as far as Seoul. Then you'll have to re-check in for your flight to Daegu. We should ask someone in the Korean Air forum here on FlyerTalk how this works after we confirm your airlines, flight numbers and times.

Hope that helps!
David