This Habsburg married Vittorio Emanuele of Savoy, one of those dynastic marriages intended to promote national security for the Austro-Hungarian Empire. She lived until 1855 at which time Vittorio Emanuele aligned himself with France to secure French assistance for unifying Italy. This paid off at Magenta and Solferino in 1859 when Savoian troops and their French allies defeated Austrian forces. Her Wikipedia article is here.