Top 5 most powerful army

There are so many advanced army in every country. However,many small countries do not have their own army. There are army in some countries which are very powerful and advanced. 

1. USA Army

The United States Army (USA) is the largest branch of the United States Armed Forces and performs land-based military operations. It is one of the seven uniformed services of the United States and is designated as the Army of the United States in the United States Constitution, Article 2, Section 2, Clause 1 and United States Code, Title 10, Subtitle B, Chapter 301, Section 3001. As the oldest and most senior (in official precedence) branch of the U.S. military, the modern U.S. Army has its roots in the Continental Army, which was formed (14 June 1775) to fight the American Revolutionary War (1775–1783)—before the U.S. was established as a country.As a uniformed military service, the Army is part of the Department of the Army, which is one of the three military departments of the Department of Defense. The U.S. Army is headed by a civilian senior appointed civil servant, the Secretary of the Army(SECARMY), and by a chief military officer, the Chief of Staff of the Army (CSA) who is also a member of the Joint Chiefs of Staff. In the fiscal year 2017, the projected end strength for the Regular Army (USA) was 460,000 soldiers; the Army National Guard (ARNG) had 335,000 soldiers, and the United States Army Reserve (USAR) had 195,000 soldiers; the combined-component strength of the U.S. Army was 990,000 soldiers.

2.Russian  army

The Armed Forces of the Russian Federation(Russian: Вооружённые Си́лы Росси́йской Федера́ции, tr. Vooruzhonnije Síly Rossíyskoj Federátsii) are the military service of the Russian Federation, established after the dissolution of the Soviet Union. On 7 May 1992, Boris Yeltsin signed a presidential decree establishing the Russian Ministry of Defence and placing all Soviet Armed Forcestroops on the territory of the Russian Soviet Federative Socialist Republic under Russian control.^[13] The Commander-in-Chief of the Armed Forces is the President of Russia. The Russian Armed Forces were formed in 1992.As of January 2017, the Federation of American Scientists estimated that Russia has approximately 1,765 deployed strategic warheads, and another 2,700 non-deployed strategic and deployed and non-deployed tactical warheads, plus an additional 2,510 warheads awaiting dismantlement.Russia's Strategic Rocket Forces controls its land-based nuclear warheads, while the Navy controls the submarine based missiles and the Air Force the air-launched warheads. Russia's nuclear warheads are deployed in four areas:

3.Chinese army
The Chinese People's Liberation Army (PLA) is the armed forces of the People's Republic of China (PRC) and Communist Party of China(CPC). The PLA consists of five professional service branches: the Ground Force, Navy, Air Force, Rocket Force, and the Strategic Support Force.The PLA is the world's largest military force, with a strength of approximately 2,285,000 personnel, 0.18% of the country's population. In September 2015, Xi Jinping, the General Secretary of the Communist Party of Chinaand the commander-in-chief of the PLA, announced a reduction of the number of military personnel by 300,000.^[3] The PLA's insignia consists of a roundel with a red star bearing the Chinese characters for Eight One, referring to the Nanchang uprising which began on August 1, 1927.The PLA is under the command of the Central Military Commission (CMC) of the CPC. It is legally obliged to follow the principle of civilian control of the military, although in practical terms this principle has been implemented in such a way as to ensure the PLA is under the absolute control of the Chinese Communist Party.

4.Isreali army

The Israel Defense Forces (IDF; Hebrew: צְבָא הַהֲגָנָה לְיִשְׂרָאֵל‎  Tsva ha-Hagana le-Yisra'el, lit. "The Army of Defense for Israel"; Arabic: جيش الدفاع الإسرائيلي‎‎), commonly known in Israel by the Hebrew acronym Tzahal (צה״ל‎), are the military forces of the State of Israel. They consist of the ground forces, air force, and navy. It is the sole military wing of the Israeli security forces, and has no civilian jurisdiction within Israel. The IDF is headed by its Chief of General Staff, the Ramatkal, subordinate to the Defense Minister of Israel; Lieutenant general (Rav Aluf) Gadi Eizenkothas served as Chief of Staff since 2015.An order from Defense Minister David Ben-Gurion on 26 May 1948 officially set up the Israel Defense Forces as a conscript armyformed out of the paramilitary group Haganah, incorporating the militant groups Irgun and Lehi. The IDF served as Israel's armed forces in all the country's major military operations

5.Indian army

The Indian Army is the land-based branch and the largest component of the Indian Armed Forces. The President of India serves as the Supreme Commander of the Indian Army,and it is commanded by the Chief of Army Staff (COAS), who is a four-star general. Two officers have been conferred with the rank of field marshal, a five-star rank, which is a ceremonial position of great honour. The Indian Army originated from the armies of the East India Company, which eventually became the British Indian Army, and the armies of the princely states, which finally became the national army after independence. The units and regiments of the Indian Army have diverse histories and have participated in a number of battles and campaigns across the world, earning a large number of battle and theatre honours before and after Independence.The Indian Army has a regimental system, but is operationally and geographically divided into seven commands, with the basic field formation being a division. It is an all-volunteer force and comprises more than 80% of the country's active defence personnel. It is the 2nd largest standing army in the world, with 1,200,255.