This week on "50 Weeks That Shaped America," we're headed to the winter of 1777-1778 and the strategic retreat by the Continental Army to Valley Forge, PA. Over the course of that winter, George Washington worked to turn the army from a group of ragtag militias into a unified force -- all with the help of a mysterious Prussian general. Jody, Niki, and Kellie discuss how Valley Forge was effectively a pop-up city, and how it reflected what would come in an independent United States.

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Our team: Jacob Feldman, Researcher/Producer; Khawla Nakua, Transcripts; music by Teen Daze and Blue Dot Sessions; Audrey Mardavich is our Executive Producer at Radiotopia.