The user should note that nuclear capability is not taken into account. This listing is purely a "numbers game" meant to spark debate and including such game-changers as nuclear weapons would clearly defeat the purpose of such an experiment. In any case, most any nation going to war would more than likely refrain from using such destructive warfare being that since the atomic bombs dropped in 1945, no nation has utilized this form of warfare for at least 60+ years despite there being a good amount of conflicts since then and more nuclear powers at play in the world. If there is a World War 3, it will most likely still be of the conventional sort.
The comparisons here are for consideration in a "straight-up" war based solely on a nation's capabilities from land, sea and through the air with other statistics covering the logistical and financial aspects of waging such a campaign. Statistic sources and years are stated whenever possible. Some statistics may be estimated if concrete numbers are not available.
It goes without saying that lists such can be completely subjective, though the GFP intention is to be wholly unbiased. No list could ever offer a proper display of accurate military firepower unless one had a full-time staff researching these numbers daily with many connections to these world governments. This listing is updating approximately once every 12 months based on new (if any) information garnered from various print and online sources.
The GFP final ranking is based on an in-house formula used to generate an average of all applicable statistics found on this website when compared against each country with applicable modifiers (bonuses and penalties) added to each nations score to present a more accurate list. The last major statistics review was in February of 2009. The GFP ranking list was updated in May of 2009. Changes to the list now include factors for current/recent military experiences, training levels and equipment quality. Denmark, South Africa and Georgia are new-adds bringing the country total to 42 nations.
Enjoy the numbers! It is hardly a super-accurate scientific measurement of military strengths but still entertaining to consider at the very least.