Global Firepower maintains a database and is a popular reference: https://www.globalfirepower.com/country-military-strength-de...

But I saw several people criticizing their relatively high position on this chart given high incompetence and losses.

EDIT: Apparently this website doesn't follow any rigorous methodology. So basically the only thing their army is 2nd in the world is the nominal number of nukes (hopefully most of them don't work).