"requested the assistance" is correct and usable in written English.
You can use it when someone asks for help or support from another person or organization. Example: She requested the assistance of her colleagues to finish the project on time.
A government spokesman justified Algeria's support by saying that Mali had requested the assistance.
The suspect, Alexandros Yiotopoulos, appeared in court, where he requested the assistance of a lawyer and extra time to prepare his deposition.
Because of the Sept. 11 attacks and the subsequent anthrax outbreaks, the Capitol police, who are only lightly armed, requested the assistance of the National Guard.
Khedive Tawfīq, threatened by ʿUrābī's increasing popularity, requested the assistance of the French and British, who promptly staged a naval demonstration in the bay of Alexandria.
He maintained diplomatic relations with King Vijayabāhu of Ceylon, who in 1071 requested the assistance of Burmese monks to help revive the Buddhist faith.
He acknowledged that the government's conflicting reports had created confusion over how she had been killed, and he said he had requested the assistance of a team from London's Metropolitan Police Service, Scotland Yard, to help with the investigation.
"In light of this and the ongoing trespassing of the protesters," Mr. Clark wrote, "we are again requesting the assistance of the New York City Police Department to help clear the park".
The court injunctions, which were handed down in response to requests by private parties, allowed bailiffs to "request the assistance of police".
So how is that unfair?" Additionally, a student stated feelings of concern about their doctor's opinion of them when requesting the assistance.
Immediately following the battle, Linois used overland messengers to request the assistance of the Spanish fleet at Cadiz under Admiral Jose de Mazzaredo.
Iceland should reopen discussions, and request the assistance of a neutral third party (such as the United States or the Scandinavian countries) in negotiating a more equitable agreement.
