United States Secret Service and U.S. Department of the Treasury have/had a hierarchical relationship

Division United States Secret Service
Start Date 1865-00-00
Notes The Secret Service was organized as a division of the Department of the Treasury in 1865, to deal with counterfeiting. Its jurisdiction was extended to other fiscal crimes against the United States in later appropriations acts, but its early work in assisting in protecting the President was an unofficial, stopgap response to a need for a trained organization, with investigative capabilities, to perform this task.