Olivier Wieviorka, a historian who specializes in World War II and the Normandy landings, analyzed the film Pressure, directed by Anthony Maras. The film centers on the meteorological challenges that influenced the D-Day invasion on June 6, 1944. Wieviorka stated that the film is mostly historically accurate, though it includes some dramatization for storytelling purposes. He emphasized the crucial role of weather in the planning of the invasion, which was postponed from early May to early June due to logistical needs and the necessity of longer daylight hours for the operation. The success of the invasion depended on strict meteorological conditions. For the Navy, winds needed to remain below force 3 (12–19 km/h) or up to force 5 (29–38 km/h) during high tide, with visibility of at least 3 nautical miles (5.5 km). For aviation, a ceiling of 1,000 feet (300 m) and visibility of 3,000 feet (900 m) were required. Paratroopers needed winds below 30 km/h and enough moonlight to navigate. The invasion could only occur one day before or four days after the full moon, which limited the possible dates to June 5, 6, and 7. Ultimately, General Eisenhower chose June 5, but a storm on June 19 would have been disastrous. Wieviorka noted that there were historical tensions between British and American meteorologists, such as between Krick and Sverre Petterssen, though the film dramatizes this as a conflict between the two nations. He also pointed out that the Allies had a strategic advantage in meteorological intelligence, with data from Greenland, Ireland, and Soviet cooperation, which the Germans did not have access to. The film does not show the German perspective on weather, but Wieviorka mentioned that German generals, including Rommel, were misled by weather reports and left their positions, believing an Allied invasion was unlikely. The British meteorologist James Staag's insight that there would be a brief calm on June 6 was crucial, though conditions were still difficult with high waves and strong winds. Wieviorka noted that while the film portrays Eisenhower as more emotionally volatile than historical accounts suggest, it accurately captures his self-control and the emotional weight of the operation. He also discussed the failed Operation Tiger rehearsal in Slapton Sands, which revealed coordination issues between American and British forces, and the secrecy surrounding the operation until 1984. The film does not show the involvement of Free French forces, as they were excluded from the planning due to concerns about leaks. General Koenig, however, was included in Eisenhower's staff to coordinate with the French Resistance. Wieviorka mentioned that while there were some leaks, such as a drunken American colonel's comment and an accidental news dispatch, the Allies' security measures were effective, and the Germans never pinpointed the exact date and location of the invasion. Wieviorka concluded by reflecting on how recent films about D-Day tend to focus on prominent figures rather than the experiences of ordinary soldiers. He emphasized the importance of understanding the broader context and the collective effort that went into the invasion, beyond the portrayal of individual leaders.