Upon receiving the threatening letter, Hudson immediately ordered the activation of the disease prevention plan, but it was too late.
The Orcs not only issued a warning, but they indeed unleashed the plague. When the letter arrived, the plague had already spread among the Allied Forces.
The complexity of the personnel composition in the Allied Forces made Hudson's disease prevention plan infeasible. After all, he could only control the people in the logistics department and had no jurisdiction over the armies on the front lines and the mix of mercenaries.
Particularly, this plague has an incubation period. Before the virus outbreak, no traces could be found at all.
The appearance of a large number of non-combat casualties quickly caught the attention of the top brass of the alliance. This made the investigation into the corruption case, old news.