De or het defensie-inspanning?

The correct Dutch article is:

de defensie-inspanning

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

How to use defensie-inspanning

the defensie-inspanningde defensie-inspanning
this defensie-inspanningdeze defensie-inspanning
that defensie-inspanningdie defensie-inspanning
our defensie-inspanningonze defensie-inspanning
your defensie-inspanningjouw defensie-inspanning
every defensie-inspanningelke defensie-inspanning
which defensie-inspanning?welke defensie-inspanning?
a big defensie-inspanning / the big defensie-inspanningeen grote defensie-inspanning, de grote defensie-inspanning