It feels like with large empires using professional armies for distant provinces, especially during classical or medieval times, funding of those armies were most likely to be bottlenecked by small cliques or even single persons appointed or trusted by the state, who could easily embezzle those funds in full.
That would be more of a spectrum with corruption being more likely during times of peace, and warlords that used military funding for themselves existed any given time in history, especially when they were granted taxing authority (or claimed it themselves) by their parent state.
What I am looking for is instances where funding to raise armies were completely embezzled, arguably without even a portion of it seeing use for its actual goal. This would apply specifically for states with a strong tax system and a well-defined bureaucracy, which could get bottlenecked at a certain point allowing for a limited group to grab the money and run. Such an example could be a hypothetical general given some money to raise an army, who would grab it and run to the neighboring state instead.
Are there such instances, or is it hard to show or define since some of those funds would most likely go into hiring retinues to guard the recipient estate which could be raised as the army in times of war?