In 2025, handwritten notes revealed Winston Churchill's efforts to secure penicillin ahead of the D-Day invasion. The documents highlight Churchill's concern over the slow progress in obtaining the antibiotic, which was then considered a groundbreaking "wonder drug." The notes, which surfaced in the National Archives, detail Churchill's frustration with the delays in securing penicillin supplies. This antibiotic was crucial for treating the anticipated casualties from the Normandy landings on June 6, 1944. The documents provide a glimpse into the strategic importance Churchill placed on medical preparedness during the war. The revelation underscores the significant role that medical advancements played in wartime planning. Penicillin, discovered in the late 1920s, was still in its early stages of production and distribution during World War II. Churchill's push for its procurement reflects the broader efforts to leverage new medical technologies to support military operations. The notes also highlight the logistical challenges faced in obtaining and distributing penicillin, which was in high demand and short supply. The documents are set to be made public ahead of the anniversary of the D-Day landings, providing historians and the public with new insights into the strategic considerations of the time. The release of these notes is expected to contribute to the ongoing study of Churchill's leadership and the medical advancements that supported the Allied efforts during World War II.