Under the aegis of somebody/something
Definition 1 of 1
Pro Tip 1/3Powerful Backing
Indicates a strong influential group provides support for an activity or project. 
The health initiative thrived under the aegis of the World Health Organization.
Pro Tip 2/3Endorsement Nuance
Implies that the supporting entity endorses or approves the project, lending it credibility. 
The research was published under the aegis of a renowned scientific council.
Pro Tip 3/3Not Directly Involved
The supporting party may not be directly involved, but provides authority or resources. 
The festival was organized under the aegis of the city council.