"gain autonomy" is a valid phrase in written English.
You can use it to refer to achieving a degree of independence or freedom. For example, "The country finally gained autonomy after decades of strife."
Turks fear that if the Kurds separate or gain autonomy, it will encourage the uprising of Kurds in the east of the country.
The fans also flew the Szekely flag, the flag of a historically Hungarian-dominated area in Romania that many Hungarians would like to see gain autonomy from Bucharest.
To inoculate itself against such disruption, Santa Cruz wants to gain autonomy from the central government in La Paz.Bolivia's tensions stir wider worries.
Well before black separatists determined to gain autonomy from white allies, radical pacifists had alienated themselves from the black freedom movement.
The eight members of two parties representing the Tamil minority walked out Parliament, saying the reforms were a diversion from the country's 18-year civil war over the Tamils' efforts to gain autonomy.
After becoming prime minister in 1973, Mr. Arron led independence talks and startled some in 1974 when he predicted that Suriname would gain autonomy within a year, which it did.
Its success in gaining autonomy weakened the power of Sudan's ruling National Congress Party.
Though the academy was suppressed in the late 18th century, Napoleon reestablished it in 1808, and it gained autonomy in 1811.
In 1954 these dependencies were organized into the Netherlands Antilles, with each of them gaining autonomy in local affairs.
National Postal Museum, Washington The Saar Territory, a region bordering France, Germany and Luxembourg and administered by the League of Nations, gained autonomy with the signing of the Treaty of Versailles in 1919.
Over that time, governors – who previously served at the president's pleasure – gained autonomy and received increased federal funds to spend with little oversight.
