Maurice's motivation was the desire to manoeuvre the Republic into a better position should the war with Spain resume after the expiration of the Truce in 1621. Renewal of the Truce was a distinct possibility, but it had become less likely, as both in Spain and in the Republic more hard-line factions had come to power. Though civil war had been avoided in the Republic, national unity had been bought with much bitterness on the losing Remonstrant side, and Maurice for the moment had to garrison several former Remonstrant-dominated cities to guard against insurrection. This encouraged the Spanish government, perceiving internal weakness in the Republic, to choose a bolder policy in the Bohemian question than they otherwise might have done. The Bohemian war therefore soon degenerated into a proxy war between Spain and the Republic. Even after the Battle of White Mountain of November 1620, which ended disastrously for the Protestant army (one-eighth of which was in the Dutch pay), the Dutch continued to support Frederick militarily, both in Bohemia and in the Palatinate. Maurice also provided diplomatic support, pressing both the Protestant German princes and James I to come to Frederick's aid. When James sent 4,000 English troops in September 1620, those were armed and transported by the Dutch, and their advance covered by a Dutch cavalry column.