I agree…. Giving a proud, stubborn, determined, dug-in enemy that thus far has shown no signs that they are deterred by odd stacked against them or by overwhelming odds such an ultimatum is bound to result in their be of two things…

1. A bloody disaster where the invaders spend so many reserves that they are unable to continue their offensive (akin ironically to General Palouse’s 6th army in Stalingrad)
2. The defenders fight to the last man in a massacre which only serves to make them into natural martyrs inspiring a national sense of identity to destroy the invaders (akin to Santa Anna’s attack on the Alamo)