According to me, each letter of ARMY stands for;

A – Available 24*7 for their nation.

R – Ready to die to protect the country. 

M – Manage personal and professional life separately. 

Y – You can not sleep peacefully without them.

The safety and security of the nation depend on the powerful and strongest Army, Navy, and Air force. The governments of various countries spend millions of money on selecting warriors and training them for battle.

The world’s most powerful armies

The following are the list of the top ten strongest and most popular armies in the world; 

United States

united states

The United States Army is one of the most powerful and strongest armies in the world; they have command of all the ways of fight that are air, sea, and land. The US army was created on 14th June 1775 by the Second Continental Congress, and George Washington is the first commander of the US army. Until the 1940s, the army was relatively weak, but it becomes the strongest one today; as time passes, in 1997, they became entirely independent before they were under the control of the War Department.  

War History

First, they fought with the Indian Army in the 1790s, next is a war of 1812 begun from 1812 to 1815, after that American Civil War from 1861 to 1865, next is Spanish-American War (1898), then World war – 1898, World war II from 1941 to 1945, Korean War, Vietnam War and also Gulf, Afghanistan, and Iraq War in 1991. Have you heard about the September 11 attacks? After that, as a part of the War on Terror, the US and other NATO forces conquered Afghanistan in 2001, replacing the Taliban government. After that, again invasion of Iraq in 2003. 

Current Details 

The US army’s power index rating is 0.0718, the total population is 332,639,102, their total military personnel is 2,245,500, they have 13,233 aircraft, they have 1956 fighter aircraft, dedicated attacks are 761, they have 904 attack helicopters, about 6100 combat tanks they have, total naval assets are 490, total 21 aircraft carriers, and the defense budget is $ 740,500,000,000.   

Russia

Russia

The Russian army is the second most powerful army in the world, established after the October 1917 revolution. The first commander in chief was Marshal of the Soviet Union Georgy Zhukov. 

War History 

In the 1917 October Revolution, after that in 1918, the new government framed the Red Army, which defeated many enemies in the Russian Civil War of 1917 to 1922. Then the Polish-Soviet war from 1919 to 1921 and the Independence wars of Estonia, Latvia, and Lithuania from 1918 to 1920. From May to September of 1939, they fought against Japan. After that, as the agreement with Nazi Germany, they become part of the invasion of Polan in 1939 of the September and occupied Baltic states, Bessarabia and Northern Bukovina. And after winning so many battles, they today become the second biggest and strongest army in the world. 

Current Details

The Russian army’s power index rating is 0.07191, the total population is 141,722,205, their total military personnel is 3,569,000, they have 4,144 aircraft, they have 789 fighter aircraft, dedicated attacks are 742, they have 538 attack helicopters, about 13,000 combat tanks they have, total naval assets are 603, and 1 aircraft carriers and the defense budget is $ 129,000,000,000.   

China

China

They have a record from 2200 BC till now as the best army forces. After the Warring States Period, they became more advanced and powerful. Li Zuocheng was the first commander of the Chinese army; after that, he appointed Ou Jingu as a commander. 

War History 

The first war was the Chinese Civil War from 1927 to 1950, then Bettel Of Chamdo in the 1950s, the Korean war from 1950 to 1953, the First Taiwan Strait Crisis from 1954 to 1955, the Second Taiwan Strait Crisis from 1958, then the Tibetan Uprising in 1959, China-Burma border campaign from 1960 to 1961, then Xinjiang conflict from 1960 even till the present day, Sino-Indian war in 1962, Vietnam war from 1956 to 1969, Nathu La and Cho La clashes in 1967, Sino-Soviet Border Conflict: Zhenbao Island Incident in 1969, Battle of the Paracel Islands in 1974, Sino-Vietnamese War 1979, Sino-Vietnamese conflicts from 1979 to 1991, Third Taiwan Strait Crisis in 1996, War on Terror from 2001 till the present, Operation Ocean Shield from 2009 to 2016, Northern Mali conflict from 2012 till the present, Northern Mali conflict from 2012 till the present, Syrian Civil War from 2011 till the present day. 

Current Details  

The China army’s power index rating is 0.0854, the total population is 1,394,051,977, their total military personnel is 3,355,000, they have 3260 aircraft, they have 1200 fighter aircraft, dedicated attacks are 371, they have 327 attack helicopters, about 3205 combat tanks they have, total naval assets are 777, and 2 aircraft carriers and the defense budget is $ 178,200,000,000.

India

India

The Military Department was created within the government of the East India Company in 1776 at Kolkata; the primary function was to record orders that were issued to the army.  The first commando of the Indian army was Late Col AG Rangaraj.

War History 

Ancient India 
War Name Timing 
Avanti-Magadhan Wars(510 BCE–400 BCE)
Magadha-Vajji war(484 BCE–468 BCE)
Indian campaign of Alexander the Great(327 BCE–325 BCE)
Conquest of the Nanda Empire(321 BCE–320 BCE)
Seleucid–Mauryan war(305 BCE–303 BCE)
Kalinga War(262 BCE–261 BCE)
Medieval India 
War Name Timing 
Umayyad campaigns in India(712–740)
Chalukya–Chola wars(992–1120)
Chola conquest of Anuradhapura(993–1017)
Chola invasion of Srivijaya(1025)
Chola invasion of Kadaram(1068)
Mughal Empire 
War Name Timing 
Mughal-Rajput Wars(1525–1750)
First Battle of Panipat(1526)
Battle of Ghaghra(1529)
Ahom–Mughal conflicts(1615–1682)
Mughal–Safavid War(1622–1623
Mughal–Safavid War (1649–53)
Mughal conquest of Chittagong(1665–1666)
Tibet-Ladakh-Mughal war of 1679-1684(1679–1684)
Deccan Wars(1681–1707)
Child’s War(1686–1690)
Nadir Shah’s invasion of India(1738–1739)
Battle of Karnal(1739–February 13, 1739)
Siege of Trichinopoly (1741)
Expeditions in Bengal(1741–1748)
Seven Years’ War(1754–1763)
Indian Rebellion of 1857(1857–1858)
Maratha Empire 
War Name Timing 
Deccan Wars(1681–1707)
Battle of Vasai(1739)
Siege of Trichinopoly 

Expeditions in Bengal

(1741)

(1741–1748)

Maratha conquest of North-west India(1757–1758)
First Anglo-Mysore War(1767–1769)
First Anglo-Maratha War(1775–1782)
Maratha-Mysore War(1785–1787)
Third Anglo-Mysore War(1789–1792)
Fourth Anglo-Mysore War(1798–1799)
Second Anglo-Maratha War(1803–1805)
Third Anglo-Maratha War(1817–1818)
Indian Rebellion of 1857(1857–1858)
Company Rule In India
War Name Timing 
Battle of Plassey(1757)
Battle of Buxar(1764)
First Anglo-Mysore War(1767–1769)
First Anglo-Maratha War(1775–1782)
Second Anglo-Mysore War(1779–1784)
Third Anglo-Mysore War(1789–1792)
Fourth Anglo-Mysore War(1798–1799)
Second Anglo-Maratha War(1803–1805)
Battle of Vizagapatam(1804)
Anglo-Nepalese War(1814–1816)
The capture of East India Company ship Nautilus(1815)
Third Anglo-Maratha War(1817–1818)
First Anglo-Burmese War(1824–1826)
First Anglo-Afghan War(1839–1842)
First Opium War(1839–1842)
First Anglo-Sikh War(1845–1846)
Second Anglo-Sikh War(1848–1849)
Second Anglo-Burmese War(1852)
Anglo-Persian War(1856–1857)
Indian Rebellion of 1857(1857–1858)

Then British India wars, Azad Hind war, Dominion of India, and the last Republic of India in the 1950s till today.

Current Details 

The Indian army’s power index rating is 0.1207, the total population is 1,326,093,247, their total military personnel is 5,127,000, they have 2119 aircraft, they have 542 fighter aircraft, dedicated attacks are 130, they have 37 attack helicopters, about 4730 combat tanks they have, total naval assets are 285, and 1 aircraft carriers and the defense budget is $ 73,650,000,000. 

Japan

Japan

War History 

The Russo-Japanese war from 1904 to 1905, Turku war in 1914, World War I from 1914 to 1918, Siberian Intervention from 1918 to 1922, the Japanese invasion of Manchuria from 1931 to 1932, Operation Ocean Shield from 2009 to 2016.

Current Details 

The Japanese army’s power index rating is 0.1599, the total population is 125,507,472, their total military personnel is 319,000, they have 1480 aircraft, they have 256 fighter aircraft, dedicated attacks are 17, they have 119 attack helicopters, about 1004 combat tanks they have, total naval assets are 155, and 4 aircraft carriers and the defense budget is $ 51,700,000,000. 

South Korea

South Korea

War History 

Sino-Russian border conflicts from 1652 to 1689, French campaign against Korea in 1866, US expedition to Korea in 1871, Ganghwa Island incident in 1875, Imo Incident in 1882, Gapsin Coup in 1884, Donghak Peasant Revolution from 1894 to 1895, Korean War in the 1950s to 1953, Vietnam War from 1964 to 1973, Korean DMZ conflict from 1966 to 1969, Gulf war in 1990 to 1991, War in Afghanistan in 2002 to 2014, Iraq war from 2003 to 2008. 

Current Details 

The South Korean army’s power index rating is 0.1612, the total population is 51,835,110, their total military personnel is 6,710,000, they have 1581 aircraft, they have 402 fighter aircraft, dedicated attacks are 74, they have 112 attack helicopters, about 2600 combat tanks they have, total naval assets are 234, and 1 aircraft carriers and the defense budget is $ 48,000,000,000. 

France 

France

War History 

The modern history of France army was as mentioned; the first was the National Convention from 1792 to 1795, the Directory from 1795 to 1799, Consulate from 1799 to 1804, the First Empire was from 1804 to 1814, the Bourbon Restoration from 1814 to 1830, July Monarch from 1830 to 1848, the Second Republic from 1848 to 1852,  the second Empire was in 1852 to 1870, the Third Republic was from 1870 to 1940, World War II from 1939 to 1945, the fourth Republic was from 1946 to 1958, the fifth Republic from 1958 till today. 

Current Details 

The France army’s power index rating is 0.1681, the total population is 67,848,156, their total military personnel is 450,000, they have 1,057 aircraft, they have 269 fighter aircraft, no dedicated attacks are, they have 69 attack helicopters, about 406 combat tanks they have, total naval assets are 180, and 4 aircraft carriers and the defense budget is $ 47,700,000,000. 

The United Kingdom

United Kingdom

War History 

They involve in the 10th to 18th centuries wars and the Civil War.

(Reference: https://en.wikipedia.org/wiki/List_of_wars_involving_England)  

Current Details 

The UK army’s power index rating is 0.1997, the total population is 65,761,117, their total military personnel is 275,000, they have 738 aircraft, they have 119 fighter aircraft, dedicated attacks are 15, they have 38 attack helicopters, about 109 combat tanks they have, total naval assets are 88, and 2 aircraft carriers and the defense budget is $ 56,042,000,000. 

Brazil 

Brazil

War History 

The first was the Brazilian Independence War from 1822 to 1823, the Confederation of the Equator in 1824, the Cisplatine War in 1825 to 1828, Cananagem Revolt in 1835 to 1840, Ragamuffin war from 1835 to 1845, Praieira revolt in 1848 to 1849, Platine war from 1851 to 1852, Uruguayan war from 1864 to 1865, Paraguayan war from 1864 to 1870, Revolta da Armada from 1893 to 1894, War of Canudos from 1893 to 1897, Acre war from 1899 to 1903, Contestado war from 1912 to 1916, World war I from 1917 to 1918 and many more. 

Current Details 

The Brazilian army’s power index rating is 0.2026, the total population is 211,715,973, their total military personnel is 2,074,500, they have 676 aircraft, they have 43 fighter aircraft, dedicated attacks are 77, they have 12 attack helicopters, about 439 combat tanks they have, total naval assets are 112, and 1 aircraft carriers and the defense budget is $ 29,300,000,000. 

Pakistan

Pakistan

War History 

The first was Indo Pakistani War from 1947 to 1948, Balochistan Conflicts from 1948 till today, the Second Indo-Pakistani war in 1965, the Bangladesh Liberation war in 1971, the Civil war in Afghanistan from 1996 to 2001, the Kargil war from 1999, Afghanistan-Pakistan skirmishes from 2003, War in Waziristan from 2004 till today. 

Current Details 

The Pakistani army’s power index rating is 0.2073, the total population is 223,500,636, their total military personnel is 1,704,000, they have 1,364 aircraft, they have 357 fighter aircraft, dedicated attacks are 90, they have 53 attack helicopters, about 2,680 combat tanks they have, total naval assets are 100, and no aircraft carriers and the defense budget is $ 12,275,000,000.