Just compared AIP of NPC 1115 (preevo and evo), dunno if it's even the right NPC.
The preevo one got 2 time checks:
17:01 and 17:31
21:58 and 21:59
and a trigger 'Clanfield_out'
I haven't done anything with AIPs yet, so I don't know what that all means, but maybe this one has something to do with the clan war amelia mentioned.
The evo one got a complete different content, dunno what that stands for.
Afaik this system was not called clan war but clan field. :/
Edit: Just checked:
QC001.QSD seems to be that clan field war quest because there are Clan Teleportations to clan fields (maps 11, 12, 13, ..)
QN-CLAN-DRAGON.QSD would be the one you mean, i guess.
Both files found in latest naROSE client.