Warcraft III: Reign of Chaos/The Long March

Two days later, upon the desolate plains of the Barrens....

Mission Objectives

 * Main Quest - Three Oases
 * Lead the caravan to the first oasis
 * Lead the caravan to the second oasis
 * Lead the caravan to the third oasis
 * Thrall, Cairne and the caravan must survive

Strategy
Start off by taking Thralls forces eastward, Carine's caravan will automatically follow Thrall, so there is no need to worry about controlling two different platoons...yet! just make sure not to wander too far off because the caravan will get randomly attacked from behind. You will meet some resistance while heading east untill you reach the the bend which paths' off to the west; Here, are quite a few maruders, so make use of Thrall's Chain Lightning attack. Continue around the bend and follow the west path untill you reach the first Oasis; here you can rest up and restore your squad's health. You also get three more Grunts.

After healing your forces to full strength, head north east a bit from the first Oasis you can choose to fight some murlocs up north and gain some experience points or continue eastward. While moving east you will find some boxes with two marauders guarding them, one of them will contain a mana potion, pick it up if you need it and continue to move east. After reaching the end of this path go north untill you see some kodos to the east and the west path. You can choose to fight the kodos to get claws of attack +3, but they do hit you forces pretty hard. Put up a healing ward and take them down as fast as you can. After picking up the claw of attack +3, continue by heading west. When you reach the Goblin Merchant, you will notice the intensity of the marauder attacks increasing. Ensure to constantly check the health of your troops. From the mechant shop head north until you are able to travel northeast towards the second oasis. Rest your troops here and you'll obtain a few Catapaults.