The correct answer to this open question is the following.
The three reasons that the Pennsylvania army gave for staging a mutiny were the following: they demanded an increase in their salaries, higher pay, better housing, better places to stay and rest; and better treatment, respect, and preparation from the government. Let's have in mind that during the Revolutionary War of Independence in which the Continental Army fought the British troops to gain independence from the English crown, the American soldiers were not what we know a formal or professional army. They lacked many things, beginning with proper military preparation. The British Army was much better in all senses. That is why, General George Washington asked a Prussian military Official Baron Von Steuben to come to Valley Forge during the winter of 1777-1778, to train the Continental Army.