Final answer:
The stanzas from Philip Freneau's poem discuss the celebration of American independence and the peace after the Revolutionary War, focusing on the joys of freedom and the recognition of the heroism involved.
Step-by-step explanation:
The common topic from the colonial and early national period being developed in the stanzas from Philip Freneau's poem is the celebration of American independence and the peace that followed the Revolutionary War.
The poem praises the newfound freedom and the end of British rule, symbolized by the departure of General Washington. It reflects the joy of the American people as they welcome an era of peace and independence, highlighting the heroism of those who fought and the admiration from others around the world for the American struggle and achievements.