De or het legerhervorming?

The correct Dutch article is:

de legerhervorming

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

How to use legerhervorming

the legerhervormingde legerhervorming
this legerhervormingdeze legerhervorming
that legerhervormingdie legerhervorming
our legerhervormingonze legerhervorming
your legerhervormingjouw legerhervorming
every legerhervormingelke legerhervorming
which legerhervorming?welke legerhervorming?
a big legerhervorming / the big legerhervormingeen grote legerhervorming, de grote legerhervorming