The phrase "army is required" is correct and usable in written English.
It can be used in contexts where a military force or personnel is needed for a specific task or situation.
Example: "In order to secure the area, an army is required to maintain peace and order."
Alternatives: "military presence is necessary" or "troops are needed".
The army was required to issue a second statement, saying it "laments" Mr. Herzog's death and acknowledging "the lack of a profound internal discussion" about human rights among troops.
By May 15, all foreign armies are required to submit plans for the final withdrawal from Congo.
In the early 1830s British armies were required to suppress the thugs (Hindi: thag), a fraternity of assassins and plunderers (dating from at least the 14th century) who were roaming across central India.
They resonate deeply for many in Syria, where army service is required, but especially here in the coastal province of Latakia, where support for the government is strong.
She served in the army after high school, as is required of most Israelis, Ms. Dorvat said.
What is required, more people now argue, is an army of foreign nannies.
Food is required faster than coin to build an army, wood is not that important, as both grenadier and musketeer do not require them.
In fact, Chávez makes so much policy, ad hoc, on the show that cabinet members and army officials are required to attend tapings just to keep up.
As an Algerian army officer, he was required to present his manuscripts for approval by military censors.
Britain, fretting over Russia's growing influence, sent an army (two camels were required to transport the officers' cigars), which was met in Kabul by "a tall, manly figure with a large head and gaunt face" who introduced himself as "a free and enlightened citizen of the greatest and most glorious country in the world".
