The overthrow of the Huguenots in 1629 made Richelieu's position seemingly unassailable, but the next year it received its severest test.
Little by little his policy, always supported by a majority in a house of representatives elected by a corrupt and narrow franchise, became more reactionary and purely dynastic. His position in France seeming to be unassailable, he sought to strengthen it in Europe by family alliances.
Their new stronghold, screened by mountains and forests, was unassailable by cavalry or artillery, but admirably suited to the light-armed Uskoks, whose excellence lay in guerilla warfare.
He carefully considered his positions, found them unassailable, and published his Resolutions, the most carefully written of all his works.
In eight years of hard work as director of a special land commission he settled the titles of land acquired by the French nation at the Revolution, and placed on an unassailable basis the rights of the proprietors who had bought this land from the government.