The phrase "a tiny army" is correct and usable in written English.
It can be used to describe a small group of people or entities that are organized for a specific purpose, often in a military or competitive context.
Example: "Despite their size, the tiny army managed to defend their territory against much larger forces."
Alternatives: "a small battalion" or "a miniature force."
It was while recovering from tuberculosis that he started reading voraciously – philosophy and classics in translation as well as contemporary fiction – and it was while living, on a tiny army pension, in Majorca that he started writing.
They have questioned how a poor orphan living on a tiny army stipend could donate so much money to the needy, and how he collected more than 300 pounds of cow dung on a single day during Chinese New Year.
A lavish party — designed by the government to court the Japanese industrialist Mr. Hosokawa, with a special performance by the internationally esteemed lyric soprano Roxane Coss, whom he has long loved from afar — is invaded by a tiny army of terrorists, consisting of three revolutionary "generals" and fifteen youthful recruits from the impoverished countryside.
A tiny army, the Maccabees, led a revolt.
(NB: The Slither poster looked like a tiny army of sundried tomatoes joining a girl in the bath).
So Kenya decided to extend her project beyond Instagram, making a tiny army of pocket-sized white men.
When President Sylvanus Olympio refused to take 626 Togolese veterans of French wars into Togo's tiny army, a group of them, including Eyadéma, assassinated him in an otherwise almost bloodless military coup (January 1963) and installed a civilian, Nicolas Grunitzky, as president.
The second time was on May 16th, when David Granger, a former chief of the country's tiny army, was sworn in as president.
(Last spring alone, before leaving on a trip through southern Africa, he learned three hundred and fifty calls, including that of the blacksmith plover, which he likened to a "tiny little army of blacksmiths with tiny little anvils").
Taking advantage of my overstuffed vulnerability on a recent weekend in New Orleans, a tiny Middle Eastern army carrying Kalashnikovs somehow broke through my epiglottis and at about 10 a.m.
When would the Northern Alliance, forever "poised to take" Mazar-i-Sharif, actually move what looked like its couple of tanks and a tiny stage army of men?Western television-watchers were not alone in their doubts.
