This chapter focuses on the third social movement case study in this book, the worldwide Women’s March that took place on January 21, 2017, the day after the US presidential inauguration. Washington D.C., the focus of this analysis, was the largest single-day protest in US history. Methods used to study this event included analysis of images using unsupervised clustering and temporal analysis of images posted on Instagram. The March in Washington D.C. is notable both for its location as a site of national importance, as well as for the importance of social media in creating and sustaining a shared sense of community through posting and reposting photos for some months. Communications using social media began during the planning phase using Facebook, later transitioning to multiple forms of social media including prominently Instagram.