Army vs. Marines

A large, highly organized military force, concerned mainly with ground (rather than air or naval) operations.

Example: ‘The army was sent in to quell the uprising.’;

Used absolutely for that entire branch of the armed forces.

Example: ‘The army received a bigger share of this year's budget increase than the navy or air force.’;

(often capitalized) Within a vast military, a very large tactical contingent (e.g. a number of divisions).

Example: ‘The Fourth Army suffered such losses that its remainders were merged into the Second Army, also deployed on the Western front.’;

The governmental agency in charge of a state's army.

Example: ‘The army opposed the legislature's involvement.’;

(figuratively) A large group of people working toward the same purpose.

Example: ‘It took an army of accountants to uncover the fraud.’;

(figuratively) A large group of social animals working toward the same purpose.

Example: ‘Our house is being attacked by an army of ants.’;

(figuratively) Any multitude.

Example: ‘On sunny days the beaches draw armies of tourists of all kinds.’;

A collection or body of men armed for war, esp. one organized in companies, battalions, regiments, brigades, and divisions, under proper officers.

A body of persons organized for the advancement of a cause; as, the Blue Ribbon Army.

A great number; a vast multitude; a host.

Example: ‘An army of good words.’;

a permanent organization of the military land forces of a nation or state

a large number of people united for some specific purpose

An army (from Latin arma via Old French armée, [feminine]), ground force or land force is a fighting force that fights primarily on land. In the broadest sense, it is the land-based military branch, service branch or armed service of a nation or state.

Example: ‘arms, weapons’; ‘armed’;

Marines, or naval infantry, are typically a military force trained to operate in littoral zones in support of naval operations. Historically, tasks undertaken by marines have included helping maintain discipline and order aboard the ship (reflecting the pressed nature of the ships' company and the risk of mutiny), the boarding of vessels during combat or capture of prize ships, and providing manpower for raiding ashore in support of the naval objectives.