Warcraft 3 Frozen Throne Walkthrough for Alliance:
Chapter 1: Misconceptions
Main Quest: Repair the Observatories
Repair the Three ObservatoriesThe first thing to do in this chapter is get a secret item. Use Kael's flamestrike on the trees to the north then go through the new passage. There is a single tree (see screenshot) which has a bird that will come out if you use flamestrike yet again. Use Kael to force attack the bird, which will drop a robe of the magi +6. Now head to the west and kill some murlocs to get a maul of strength. Return to where you started and head west, then south where you will fight some Dalaran Mutants. You certainly shouldn't be losing any troops because you have two priests. The path here is very linear. You'll fight a number of different types of opponents. Keep in mind as you go that Prince Kael's Flamestrike ability hits your own units, so it can be very dangerous for your melee fighters.
Optional Quest: Hidden Caches
The first cache can be found just north of the wizards along the linear path. There is a group there guarding a gate with the cache behind it. Kill them and destroy the gate to grab a tiny castle, along with some lumber, gold and a rune of healing. Further along the path, to the southeast you will see a fountain of mana. The bandits there drop a manual of health for Kael, so grab it!
Use the fountain of mana to ensure your priests are at full power, then head southeast and fight the Overlord, He'll drop a tome of intelligence for Kael, who should already have a nice mana pool and be doing good damage. Keep following the path toward the second cache, which should be in unrevealed terrain to the south. You will need to use flamestrike to reach it, but it will provide a tiny barracks and altar of kings when you do.
The next step is to work your way to the northwest, where you'll see a cutscene. The Naga will offer you transports to cross to the other observatories. Board the transports and head just north, where there is a gold mine. Use your tiny base items to found a new base here. Your peasant by the first observatory can either be picked up by transport to build farms near the base. Your top priority now is to establish an economy.
Put four peasants on gold mine duty, and four on woodcutting duty (have them chop east of the mine). A last peasant can build structures for you. A lumber mill is a good idea so you can upgrade the amount of lumber your peasants can carry. To do that, you'll need to upgrade your town hall to a keep. You want to anyway, so that you can make more priests and eventually mortar teams.
Once you have a decent group that can stay home to defend your base, send Kael and his army to the north and hit the guardians of the goblin merchant. This will get Kael some extra experience and grant you access to some scrolls of protection and healing that will come in handy later. Have a peasant work on repairing the observatory on the island and guard it with your second group. Another useful thing Kael can do at this point is board a ship with his starting army and a couple extra footmen and head toward the southwestern supply cache. You'll fight your way through a number of ogres, but at the end will encounter a level 9 ogre that can join your army after defeated, along with some extra goodies. Return to the boats and head toward the northwestern supply cache.
To get to the final supply cache, you will need to use Kael's flamestrike once more. There you will receive a ring of protection +1. The final objective is to repair the last observatory, which is near the last supply cache. Send a few peasants to finish up repairs and you'll be done with the mission.