During her reign, Anne favoured moderate Tory politicians, who were more likely to share her Anglican religious views than their opponents, the Whigs. The Whigs grew more powerful during the course of the War of the Spanish Succession, until 1710 when Anne dismissed many of them from office. Her close friendship with Sarah Churchill, Duchess of Marlborough, turned sour as the result of political differences. The Duchess took revenge with an unflattering description of the Queen in her memoirs, which was widely accepted by historians until Anne was re-assessed in the late 20th century.