How big is your military?

[Greater Hohenstaufen]

Army personnel: 5,940,000

Navy personnel: 700,000+

Air Force personnel: 1,345,000

In a state of national emergency (Invasion,civil war) any citizen over the age of 16 can be called to serve in the military.
So in theory the Military could arm and equip up to 2.3 billion men and women.

[Fatatatutti]

We are perfectly prepared to defend our country against all forms of aggression and indeed attack, if needed to.

Perfection is over-rated. You may be perfectly prepared to fight the last war but how can you know what shape the next war will take?

[New Carloso]

The Carlossian Armed Forces is comprised of 2,390,533 active personnel; 932,501 in the Army, 456,516 in the Marine Corps, 486,515 in the Navy and 515,001 in the Air Force. Further details on things such as vehicles etc. are unavailable at this time bar the fact Navy operates 414 commissioned ships including 64 fleet submarines, 29 ballistic missile submarines, 14 amphibious assault ships, 10 amphibious transport docks, 12 landing ship docks, 7 supercarriers, 5 aviation cruisers, 36 guided missile cruisers, 4 battlecruisers, 62 destroyers, 39 frigates, 27 corvettes, 9 mine countermeasures vessels, 6 minelayers, 46 offshore patrol vessels, 6 icebreakers, 4 survey ships, 20 replenishment oilers, 5 tracking ships, 3 submarine tenders and then 3 types of "classical ships"; 4 battleships, 1 torpedo cruiser and 1 first-rate ship of the line. In addition, there are 2,056,512 personnel in reserve with about 4,000,000-10,000,000 in the provincial militia forces.

EDIT: In 2015, the budget of the armed forces was $961.7 billion and accounted for 5% of GDP.

[Estainia]

Eleven million men-at-arms fill the ranks of His Majesty's Imperial Army with another million and a half accounted for in the Imperial Navy. In addition there are eighty-five thousand three hundred eleven Knights of various Chivalric orders. Another two million men can be gathered from the Houseguards of the Noble Houses, as well. Suffice it to say, the Imperial Military is a vast organ.

[Laredo-]

Approximately 1,120,000 active duty military personnel.

[Zurkerx]

The Constitutional Empire's Military is quite large actually. It's 300,000,000 strong.

[Korouse]

*Insert ridiculous number here with equally ridiculous numbers of planes, ships and tanks*

totally legit.

[Rhodesia and Bechuanaland]

The Armed Forces of Rhodesia and Bechuanaland (AFORB) are small. The active duty segment of the Armed Forces consists of only roughly 174 000 personnel, and only about 20% of whom may be considered front-line soldiers. In times of national emergency, the AFORB can increase in size to roughly 400 000 personnel, and outfit the four Army divisions and the Air Force's fourteen assorted squadrons of aircraft.

[Galindo Prime]

"We belong to the proud 5% who see no need for Military."

[Yugo-Austria]

I have mandatory military service, over 4 billion citizens, and all of my men are in giant exoskeletons.
Oh, and we have space ships.
Lots of them.
I'd say we're huge.

[Balat]

Our combat-ready personnel is about 500,000 spacemen, and our Star Fleet numbers around 13,000 vessels, however, most of those are left unmanned due to the lack of personnel. We have begun projects to outfit at least 10% of our fleet with remote controlling features, and this has proven very successful as of the launch of the Econia, the first ship to be outfitted with a remote control, operated by only a dozen technicians aboard our major starport, the Iserlohn Fortress. As of now, we can mobilize some 3,000 vessels for war, which is extremely small compared to the amount of combat-ready vessels of the Galactic Empire, estimated to be in the hundreds of thousands.

[Federal Union of Democratic Republics]

0.3% of population (includes both active and reserve). So, not too large (though not small).

However 0.1% of the population is part of the Federal Gendarmerie (a federal paramilitary police force) in addition to 0.3% of the population who is part of the civilian police forces of the republics and territories.

[North Amerikan Union]

Extremely overstretched and oversized, in both foreign deployments to Eastern Europe and the Middle East, and in large scale domestic political repression operations.

[Weimar Germany]

99,999 people, total.

[Nachfolgia]

Since our society thrives on war and chaos, The Reich upkeeps a very large military. Every child born in the Reich is trained for their entire lives to one day fight in a war we are guaranteed to get involved in. We fight, that is how we win and that is how we die. As of August 30, 2015 at 9:09pm, The Wehrmacht of the Reichsmilitarstrat of Nachfolgia of has the enormous man power 0f 67,798,496 servicemen and women with 36,943,278 in the reserves, Volkssturm, and the academies.

[Birkenau]

Roughly 200 million and counting. You can never have enough military to defend an ideology and nation.

[Galizan]

The National Defence of Galizan consists of 55,000 active personnel, and 200,000 in reserves.

[Nubpryton]

In terms of manpower, the Nublean Grand Army has 29,000,000 million men in active service along with 11,000,000 more in reserve. The Nublean Grand Fleet has 13,000,000 personnel in service and the Nublean Air Force has around 7,000,000 pilots in service.