The grievance from the Declaration of Independence that led the American colonists to create the Sixth Amendment to the U.S. Constitution is:
“[They deprive] us, in many cases, of the benefits of trial by jury.”
This grievance reflects concerns about fair trials and the rights of individuals in the judicial process, which were addressed in the Sixth Amendment, ensuring the right to a speedy and public trial, an impartial jury, and other protections for those accused of crimes.