A.E.I.O.U.
By Europe's established custom, the call to war was sounded only from the first fair days of spring to the last fair days of autumn. The rainy, snowy, freezing months were spent in so-called winter quarters. This had been the custom since ancient times; even the most capable generals had to choose the time for battle according to the calendar.
Yet Pichegru ignored this precedent. Besides "displaying humanity's cultural heritage," museums also served to explain the natural sciences. Land absorbed heat quickly and lost it quickly; the ocean absorbed heat slowly and lost it slowly. Europe lay within the westerlies. In summer, the westerly winds carried away the heat from the land, while in winter, they blew the heat and moisture released by the sea back over the continent, indirectly keeping Europe at a relatively comfortable temperature. It was unlike Siberia, the center of continental high pressure, where winter brought no warmth from the sea and instead allowed Arctic air to sweep in, turning Siberia into a "cold pole" even colder than the North Pole.
Whenever she thought of the Quidditch World Cup held in the Siberian forests in 1809, followed by the Killer Forest Incident, it was difficult for her to feel cheerful. The one slight comfort was that the Quidditch World Cup was held in summer, so at least there would be less of Siberia's deadly cold wind.
Using Dark magic to forcibly tear trees from the soil where they had grown for years would only drive them mad. Likewise, it was impossible to use the Muggles' war as an excuse to cancel the Quidditch World Cup. It would only intensify the conflict—unless another French Revolution broke out and all the French wizards were sent to the guillotine. Then, naturally, they would have no mood for any