The phrase "attained power" is correct and usable in written English.
It can be used to describe someone or a group that has successfully gained control or influence, often in a political or organizational context.
Example: "After years of struggle, the party finally attained power in the recent elections."
Alternatives: "gained power" or "achieved power".
Once he attained power, he seldom left western Russia, preferring to stay in or near the Kremlin most of the time.
Once he had attained power, was Johnson's crucial role in passing civil-rights legislation a result of his ambition or his compassion?
"We attained power by the valid ballot and proved our worth by winning in three successive elections without benefit of a daily press or foreign finances.
By 1793 he had become a large landholder, having attained power as inspector of public works and paymaster of the corps.
While Freud came to Britain with his family in 1933, the year Hitler attained power, Auerbach's fate was more desperate and brutal as his parents stayed on hoping against hope that things would be all right for German Jews.
Under his reign the Hasmonean kingdom of Judaea in ancient Palestine attained power and great prosperity, and the Pharisees, a scholarly sect with popular backing, and the Sadducees, an aristocratic sect that comprised the priesthood, became well-defined religious parties.
Neither could have attained power-broker status without a supreme ability to play a frustrating balancing act throughout their long on-screen careers.
If a woman somehow does attain power, they assume she will use it to destroy men.
"The problem", opined Mr Moroz, "is that certain individuals want to attain power at any price".
Since attaining power, he has governed in a reasonably market-friendly manner.
Analysts are skeptical, saying his about-face was calculated to win votes and attain power.
