Complex sentence: This letter to "The Inhabitants of America" outlined what Arnold saw as the corruption and lies and tyranny of the Second Continental Congress and the Patriot leadership and encouraged Americans to reject the Articles of Confederation and return to the British Empire.
Split into simpler sentences: This letter to "The Inhabitants of America" outlined what Arnold saw as the corruption, lies, and tyranny of the Second Continental Congress and the Patriot leadership. So he encouraged Americans to reject the Articles of Confederation and return to the British Empire.