multis or secret alliance not sure

Voogan. & Kia176

Game #64202

I had 3 armies on New Guini, Indonesia, and Eastern Ausi. total of 9
Voogan has 3 on Western Ausi....and is not his best play with his set up to go Ausi.

He drops 3 on West Ausi, Kia goes suicide on me first move and Voogan claims ...