Quote Originally Posted by Utopia Wiki
Anonymity

War is at the heart of the world of Utopia, but the fear of retaliation makes many leaders cringe. This spell casts an aura of mystery around your army. After a successful cast, your forces will remain anonymous during your next attack -- while your kingdom will be revealed, your enemy will not know your province's name.

Available to: All
Effect: Hides your province name during your next attack at the cost of no honor gains,
causing the attacked province to be unable to ambush that attack.
Increases your attach times by 15% for your next attack.
Duration: removed after attack
Cast Message: Our next attack will be cloaked under the shades of anonymity.
Mystic Advisor Message: Our armies are surrounded by a cloud of anonymity for our next battle.

...

War Spoils

Ordinarily, any land captured in attacks require time to take control of and become available for your own use. War Spoils gives you the opportunity to get this land from combat immediately. The spell lasts just a few Utopian Days, but is more than enough to use on a couple of attacks. This allows you to begin the process of expanding much more quickly than otherwise.

Available to: The Undead, Halflings, Faeries
Effect: Makes the land gained from Traditional March immediately available.
Duration: max 6 hours
Cast Message: Our army has been blessed with immediate War Spoils for 3 days!
Mystic Advisor Message: War Spoils give us quick returns on our attacks
Entirely different effects, and I've never been denied using Ambush against an attack that used War Spoils (unless, of course, they used War Spoils AND Anonymity). In my experience, the game functions 100% in accordance with what's presented in the Wiki - and, if that has changed, it needs to be fixed.


Though where I think some of this confusion may lie is people complaining that they Ambushed an army but didn't capture any land. Of course they didn't - due to War Spoils, the Army didn't have the land.