How does it combine?

[arin]

I read a bit about The Expansion, but I didn't get it for a 100% how (or "if") the Main Game combine with The Expansion. I mean can you use the new units from The Expansion while playing on the old board. And if you can, coul you please tell me how it looks (just overall stuff). I finaly decidet to bay The Expansion and I'd just like to know how it looks.

[Lord Aragorn]

The Main Game can be combined with The Expansion.
Here are some new features:

5 new units:
-Hillmen of Dunland
-The Corsairs of Umbar
-The Ents of Fangorn
-The trebuchet
-The siege towers

New characters
-The Witch-King, Chief of the Ringwraiths
-The Balrog of Moria, Evil of the Ancient World
-Lady Galadriel, Keeper of Nenya
-Smeagol, Tamed Wretch

2 new scenarios - Gondor and Rohan

The scenarios do not combine with The Main Game. they stand like game for it self. In Rohan scenario you fight for Helm's deep, in gondor for Minas Tirith. There are also some new characters for both scenarios (Théoden, King of Rohan; Théodred, Marshall of Westmark; Éomer, Marshall of Eastmark; Treebeard, Tree Herd; Gandalf the White, The White Rider; Aragorn, Son of Arathorn; Saruman, the Many-Coloured Wizard; Gríma, Son of Gálmód; Faramir, Son of Denethor, Captain of Gondor; Imrahil, Prince of Dol Amroth; Gothmog, Lieutenant of Minas Morgul).
For Aragorn, Gandalf and Saruman you use former figures. There isn't figure for Grima only cards (but lot of them). For Gothmog you use figure of The Mouth of Sauron, Lieutenant of the Tower of Barad-Dûr. For Imrahil, Faramir, Eomer, Theodred and Theoden you will get new figures. They look like lider figure, but they are silver colored (like others charaters).

Ents, they are used in Main Game an scenario too, have they own figures. They are stronger than before and can be used to defend Rohan or Lorien. Treebeard is used in the Expansion. Siege towers are used for attacking strongholds of FP. Trebuchet are oposite. They are used for defending of FP. If there are more siege towers the battle does not finishes after one turn.
Hilmen of dunland are part of Isengard nation. They provine new strategies for assault on Rohan, but they are also useful for attacks on Eriador.
The Corsairs faction belongs to the Southron and Easterling nation. They are used for faster transport to costal region. Both Hillmen and Corsairs are used in Main Game and Expansion.

Galadriel also have her own figure. She must stay in Lorien like Saruman in Orthanac. Gives extra dice if comes before Gandalf the White.
Balrog is important unit in defending of Moria. He have new, impresive figure (maybe best figure in game).
Smeagol does not have figure. Smeagol IS NOT a Golum. Rules are complicated about this, so I will not try to talk about that now.
There is also new figure of Witch-King. You can also use old, as you want. They have total different abilities.

That is it. I have bought the Expansion and I have not regred it. It makes a game even better!

[arin]

It sounds really cool. So you start the main game "normaly" with the "old" unit set, and further in the game you can muster the new units, use new Characters, play the new Event Cards etc.?

[Lord Aragorn]

Yes, just like that. And it is really cool.