A coup.
From a pragmatic standpoint, this is the only way to sever the state from the V.E Company while minimizing the loss of Charlemagne. The resistance movement's actions were previously dismissed as worthless by Roland due to their rough preparations and their failure to adequately assess potential consequences. However, after taking a closer look at the big picture, Roland had to admit, there was no better choice for the resistance.
V.E Company's economic monopoly rendered any protracted attacks futile. Political activities are costly, and only an ignorant person would wish to contest financial power with V.E Company, which can print money, possess a rampant banking and financial system, and an industrial empire of the same scale.