Despite the fact that Maria Amalia had renounced her claims to the Austrian lands upon her marriage, Charles Albert claimed the Habsburg lands by marriage to her during the War of the Austrian Succession in 1740. After an agreement with the spouse of her elder sister Maria Josepha, who would otherwise have a stronger claim than her, her husband invaded Bohemia. Maria Amalia was crowned as Queen of Bohemia in Prague on December 7, 1741. On 12 February 1742, Maria Amalia became Holy Roman Empress following Charles Albert's coronation as Holy Roman Emperor in Frankfurt, where she herself was crowned as Empress Consort. However on 14 February 1742, Bavaria was occupied by Austria.