sycophantic diplomacy; servile diplomacy
Refers to a foreign policy that follows another country's lead without asserting independence, often with a negative connotation of excessive flattery or subservience.
That country continues a sycophantic diplomacy toward the great power.
自主外交 means independent diplomacy, where a country makes its own decisions, in contrast to 追従外交 which implies following another country's lead.
Compound of 追従 (ついしょう, flattery, sycophancy) and 外交 (がいこう, diplomacy).