From wiki:

"Defence Pact (DP)

A defence pact is signed between two alliances who decide to come to each others defensive aid in times of war. These pacts may not be used against a uNAP alliance."

Sorry, if I write not clearly. I Russian, in English speak badly (

I thought that uNAP can't contain any conditions.

Tan, if uNAP has this clause, isnt its just NAP?

Clan A
Clan B
Clan C

A has FDP with B
A has uNAP with C
C attacks B.
What should A do (can A break uNAP and attack C)?