The 1955 Chalmers RCT, conducted amid a Korean War hepatitis outbreak at a Kyoto US Army hospital, randomized soldiers to strict bed rest versus ad lib activity, demonstrating equivalent recovery times in what was an unusually rigorous early trial for its era. Though sample size details remain sparse in secondary accounts and blinding was absent, this RCT directly contradicted observational assumptions of mandatory immobility, shortening hospital stays and easing military logistics. David Sackett's 1959 encounter with the 73-page report at Cook County Hospital crystallized his rejection of eminence-based practice, where senior opinion trumped data, propelling his later foundational contributions to evidence-based medicine including the 1990s Oxford Centre for Evidence-Based Medicine. Mainstream coverage often overlooks how this episode paralleled other post-WWII shifts, such as the 1948 streptomycin MRC trial, yet uniquely highlighted patient agency through the rebellious adolescent case that validated Chalmers' findings. Peer-reviewed analyses, including a 2002 JAMA retrospective on EBM origins, note Chalmers' work as a pivotal bridge from anecdotal hepatology to systematic reviews, though conflicts of interest in military-funded trials warrant scrutiny. A 2018 Lancet historical review further connects this to modern reversals, like reduced bed rest prescriptions in post-MI care following similar RCTs, revealing a persistent pattern where initial observational data delayed adoption of activity-based protocols. The original MedicalXpress piece underplays methodological constraints of the Chalmers study, such as reliance on symptom similarity rather than lab-confirmed randomization strata, which later meta-analyses addressed through larger cohorts exceeding 500 participants.