Board Thread:Theories and Speculation/@comment-45986362-20200726124108/@comment-32685487-20200805024753

If I remember correctly Itachi and Kakashi are the only other ones I can think of that were confirmed to have done B rank missions themselves as Genin, before Gaara did. In fact Itachi did the entire Chunin Exams himself as a Genin and passed with zero issues.