These rankings will not be made solely on each country’s firepower or active personnel, but also on other criteria which will be considered as an advantage in their overall defense. Read the article to know the top 10 countries.

10. Australia

Active Personnel: 60,000, Reserve: 44,000
Tanks: 59, Artillery: 75
Air Fighters: 78, Helicopters: 188
Naval Strength: 47 (Submarines: 6, Aircraft Carriers: 2)

Population of roughly 23 million, Australia is nevertheless huge, with the exception of the coastal areas, where 98 percent of its people live, the island nation is an almost 3 million square mile scorching desert.  According to the Global Peace Index, Australia ranks third in the Asia-Pacific region and 9th in the world.

9. Switzerland

Active Personnel: 100,000, Reserve: 77,000
Tanks: 224, Artillery: 224
Air Fighters: 63, Helicopters: 43

All citizens have military training, and get to keep their weapon after its completion. At present there are an estimated of 45.7 weapons per 100 people within Switzerland. So, if it ever gets invaded, almost 4,000,000 citizens are immediately available for military service with another 3,000,000 fit for joining as well.

8. Tuvalu, New Zealand, Iceland and Bhutan

All four of these nations fall within this category, not because they are heavily defended, or because of their armed forces, but because of their isolation and lack of any strategic or economic importance for a potential invader. Only New Zealand and Bhutan have any armies, of roughly 9,000 and 6,000 active personnel, respectively. New Zealand, even though it’s a developed nation, is not involved in any conflicts around the world, earning it the number four spot on the Global Peace Index in 2015.

7. Japan

Tanks: 777, Artillery: 839
Air Fighters: 289, Helicopters: 741
Naval Strength: 131 (Submarines: 17, Carriers: 3)

Their national barrier spending plan alone is some place around $49 billion, the 6th most noteworthy on the planet. Japan has an aggregate populace of more than 126 million, and somewhere in the range of 1.2 million achieve military age every year.

6. Iran

Active Personnel: 545,000, Reserve: 1,800,000
Tanks: 1,658, Artillery: 2,400
Air Fighters: 137, Helicopters: 140
Naval Strength: 398 (Submarines: 33)

While several of its neighbors have succumbed to the ravages of war, Iran is still a strong influence and stability factor in the region. For starters, Iran has a tremendously large army; the largest in the Middle East. Additionally, the nation is truly secured by mountains, ideal for disguised guarded offices and underground fortifications.

5. Canada

Active Personnel: 95,000, Reserve: 51,000
Tanks: 181, Artillery: 161
Air Fighters: 64, Helicopters: 175

Naval Strength: 63 (Submarines: 4)

Canada is the second largest country in terms of surface area after Russia, and equally as cold, located at the northern fringes of the world, Canada would be quite difficult to invade, even though most of its 35 million people live close to the border with the United States. But given its size and vast expanses of wilderness, taking over all of Canada by force could be problematic for anyone. Canada is also part of NATO.

4. North Korea

Active Personnel: 700,000, Reserve: 4,500,000
Tanks: 4,200, Artillery: 6,550
Air Fighters: 458, Helicopters: 222
Naval Strength: 967 (Submarines: 70)
Nuclear Warheads: 8

China which is North Korea’s biggest “ally” and who also supported it in the ’50’s.

3. United Kingdom

Active Personnel: 150,000, Reserves: 182,000
Tanks: 407, Artillery: 227
Air Fighters: 91, Helicopters: 397
Naval Strength: 76 (Submarines: 10, Aircraft Carriers: 1)
Nuclear Warheads: 215

Surrounded by two oceans and the ever turbulent North Sea, the British Isle can only be effectively invaded from the South, across the English Chanel. Its defense budget of $55 billion is the 5th largest in the world, as is its economy. It also has two aircraft carriers under construction, which are due to enter service in 2020 and 2022, respectively. Being a member of NATO, the UK has the advantage of strong allies.

2. Russia

Active Personnel: 766,000, Reserves: 2,485,000
Tanks: 15,400, Artillery: 10,600
Air Fighters: 751, Helicopters: 1,750
Naval Strength: 352 (Submarines: 60, Aircraft Carriers: 1)
Nuclear Warheads: 7,300

Russia is an almost impossible country to conquer. Being the largest country in the world, with 6.6 million square miles, much of the country is made out of mountains and wilderness, perfect for hidden military bases and surprise attacks. Since 2008, the country’s annual military spending has increased by almost a third and is now at $66 billion. At present the country has the largest fleet of tanks in the world.

1. USA

Active Personnel: 1,400,000, Reserves: 1,100,000
Tanks: 8,850, Artillery: 3,300
Air Fighters: 2,300, Helicopters: 7,100
Naval Strength: 415 (Submarines: 75, Aircraft Carriers: 19)
Nuclear Warheads: 7,100

The truly vast expanses of the country and all the different types of terrain, from densely forested mountains to scorching deserts. Any attacking power would experience issues clutching these spots, paying little mind to who or what was shielding them. At whatever point there’s a contention on the planet, 9 times out of 10, the US is certain to be required in somehow. While Switzerland has an expected 45.7 weapons for every 100 occupants, the US has an incredible 112. That implies that there are a larger number of weapons than individuals.