The list of the largest armies has been ranked based on their current available firepower rather than active duty military personnel.
The United States has the strongest military force in the world. It has 4.6 lakh active personnel with an annual spending of $877 billion.
Russia has a total strength of 1.32 million service personnel, and an overall number of 2.2 million military personnel.
China's People's Liberation Army has over two million trained men and women on active duty making it the world's largest armed force.
India, with 1.45 million active personnel, has been ranked as the fourth strongest military in the world.
South Korea has a formidable force of its own with about 625,000 service members on active duty and about 3 million in reserve.
The British Army ranked at sixth position has around 1.4 lakh active personnel. However, the UK has a much bigger Navy.
The Japanese army, officially known as the Ground Self-Defense Force, has 139,620 soldiers, which is around 65 percent of the military’s 230,754 total service members.