Here is my list of the top five most powerful military nations in the world, taking into account their armed forces units, active troops (including reserves), weapons capabilities (including nuclear weapons), training and military spending. If you disagree, than provide your own list or point to where you disagree. Let's start:
5. India- It has the second largest armed forces personnel in the world considering it is completely voluntary. India is surely becoming one of the most self sufficient military forces. It has the fourth largest air force and the fifth largest navy in the world. It has the opportunity for a great combat experience and training in various terrains when you take its geographic location into account. Overall, it has a good army, naval and air force and it also has around 100-140 nuclear weapons in its arsenal, with a no-first use and no use against non-nuclear state policy.
4. United Kingdom- The United Kingdom arguably has, the best equipped and well trained armed forces with the Royal Air Force being one of the most exceptional air service of any nation. Its Special Air Service (SAS) regiments is also very impressive. The U.K. also has a vast array of air crafts in its Royal Air Force. Its Royal Navy is the second largest navy unit in the world and consists of 90 commissioned ships with 12 nuclear powered submarines. It has around 200 nuclear weapons in its arsenal. In terms of military spending, the U.K. spends about $60 billion dollars and it's the fourth largest military spender. Overall, it has one of the best army, naval and air force of any nation.
3. China- With the largest military manpower and active military, China deserves to be on my number three list. It has around 2.2 million active troops (paramilitary and reserve included also) making it the largest of any nation. Its entire military is called the People's Liberation Army consisting of the ground forces (army), Navy, Air Force, Second Artillery (Strategic Missile Force) and People's Armed Police. It is slowly becoming more technologically advanced learning from the United State's military. Its Second Artillery Corps controls China's nuclear and conventional missiles. In total, China is said to have around 160-400 nuclear weapons. It ranks second in the world in military spending with around $70.2 billion. It has also recently updated its naval force and updated its tanks.
2. Russia- Russia has one of the most land based weapons of any nation in the world. Overall, they have a well equipped army and a very powerful military force. It has the fourth largest active military manpower with around 1.2 million troops and the third largest active reserve with 2.4 million troops. It has 15 naval destroyers (third most). Their special service, the Strategic Rocket Forces has the world's largest force in terms of Intercontinental Missile Ballistics (ICMB) with 561 missiles. It also has the largest stockpile of nuclear weapons in the world with about 5200 active and 8800 total warheads. It has the second largest fleet of ballistic missile submarines, only second to the United States. It is the fifth largest military spender at around $50 billion going to its military expenditure. Overall, it's one of the most powerful militaries in the world.
1. United States- It is the most technologically advanced military and overall it has the most powerful army, naval (including marine corps) and air force units in the world. It has about 1.3 million active military personnel ranking second in the world and with a military reserve of 1.4 million. It also has 450,000 paramilitary units. In total, it has 2.4 million troops. It ranks first in military spending in the world with $583 billion going into its military. It has some of the most advanced military vehicles, artillery and aircraft in the world. The United States' Navy is the largest in the world and the United States' Air Force (or USAF) also happens to be the largest in the world. It has some of the most stealthiest aircrafts including the B-2 Spirit and F-22 Raptor Aircraft Fighter. It is estimated that it has around 18,269 aircraft. The United States also has the second largest nuclear weapons arsenal in the world with 4075 active nuclear warheads and 5535 total warheads. It is truly the most most powerful military in the world.
***Notable Contenders: Iran, North Korea, Germany, Israel and Pakistan