In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.

The Confederation of the Rhine was a client state of First French Empire .
The Confederation of the Rhine ( ; French : officially " " ( " Confederated States of the Rhine " ) , but in practice " " ) was a confederation of client states of the First French Empire .