The document discusses embedded ethnography and how it was used to understand human-centered design within different environments and cultures. An ethnographer was embedded with Marines to observe their interactions and gain a deeper understanding of their capabilities based on their culture. The ethnographer underwent training and research to prepare for studying the Marines' races and cultures systematically while experiencing two different environments. Acceptance into the Marines' teams was important for gaining approval and directly interacting with them. Valuable lessons were learned beyond what was initially expected about how to design with purpose based on the cultures observed.