Original: In a 1866 coup d'état, Cuza was exiled and replaced by Prince Karl of Hohenzollern-Sigmaringen, who became known as Prince Carol of Romania.
Simplified: In 1866, a coup d'état resulted in Cuza being exiled; he was not allowed into that part of the country. Prince Karl of Hohenzollern-Sigmaringen became the new leader, and was later called Prince Carol I of Romania.