Magos são conhecidos por lutarem em guerras trouxas ...
Do Pottermore História da Magia na América do Norte: Os anos 1920
The wizards of America had played their part in the Great War of 1914-1918, even if the overwhelming majority of their No-Maj compatriots were ignorant of their contribution. As there were magical factions on both sides, their efforts were not decisive, but they won many victories in preventing additional loss of life, and in defeating their magical enemies.
Considerando que havia um rascunho para a Grande Guerra (também conhecido como a Primeira Guerra Mundial) e os magos lutaram, chegamos à conclusão de que alguns foram redigidos.