The Dukedom Of Evretis has around 2500 troops besides their city guards and garrisons as their standing army.
They can call levies or ask other nobles for reinforcements if necessary, which Isabella expects to be enough to at the very least double our numbers. Surprisingly, Isabella's reputation and standing work in our favor as her vassals either respect or fear her, which makes them more agreeable, at least initially.
However, while this works in our favor, that goodwill could quickly diminish if she suffers heavy losses in battle.
Financially, it's also not a wise move. Even with my Gift accounted for, preparing equipment for so many new soldiers would take time and money.
They would also be essentially removed from their workplace, hurting most if not all production in Evretis.
As for Terith, we expect to face an army of about 4 to 5 thousand...
During the Maides Island invasion, Hamperlon's troops numbered between 6 to 7 thousand.