Golems in Undead Chapter 1 (Trudging Through the Ashes)

In short: How do you reach 'em?

The ghouls can chop down trees, but---unless they have a place to bring the wood or can otherwise forfeit what they chopped---they can only chop down 40% of a single tree. Thus, with four ghouls, only one tree can get chopped down, and there's a lot of trees that need to go for Arthas to reach the golems.

Thanks for the reply.

Actually, I figured it out: The ghouls---in addition to being able to harvest trees for lumber---also can attack trees, which means they collect no lumber but do remove the tree. A path of attacked (not harvested) trees can be cleared to reach the golems. (Note: Much of my initial confusion owed to the fact that a selected ghoul will by default harvest, not attack, a right-clicked tree; that makes sense, of course, but it took awhile for it to dawn on me that attacking a tree would mean using the A hotkey.)