Bounty Hunter

How long does it take for the army to get to the adventure zone once I have sent them? It says I have 30 minutes to complete the adventure but my army is not on the island yet. ( I have been waiting 20 minutes.) I can only see my general on the star menu with a green bar that will be full after the 30 minutes.

That 30mins is how long it takes for you to get to the adventure, not complete the adventure. At the 30min mark, you'll see your general's garrison start to build. The time you have for adventures is shown on the right in the adventure box. Bounty Hunter gives you 3days.