De or het monstercoalitie?

The correct Dutch article is:

de monstercoalitie

Rule Words ending in -tie and -sie: almost always de. See the rule

How to use monstercoalitie

the monstercoalitiede monstercoalitie
this monstercoalitiedeze monstercoalitie
that monstercoalitiedie monstercoalitie
our monstercoalitieonze monstercoalitie
your monstercoalitiejouw monstercoalitie
every monstercoalitieelke monstercoalitie
which monstercoalitie?welke monstercoalitie?
a big monstercoalitie / the big monstercoalitieeen grote monstercoalitie, de grote monstercoalitie