De or het vredehandhaving?

The correct Dutch article is:

de vredehandhaving

Rule Words ending in -ing: almost always de. See the rule

How to use vredehandhaving

the vredehandhavingde vredehandhaving
this vredehandhavingdeze vredehandhaving
that vredehandhavingdie vredehandhaving
our vredehandhavingonze vredehandhaving
your vredehandhavingjouw vredehandhaving
every vredehandhavingelke vredehandhaving
which vredehandhaving?welke vredehandhaving?
a big vredehandhaving / the big vredehandhavingeen grote vredehandhaving, de grote vredehandhaving