Simplify the following text for a Grade 9 native English-speaking person.
Original: The authoritarian King Carol II abdicated in 1940 , and succeeded by the National Legionary State , in which power was shared by Ion Antonescu and the Iron Guard .
Simplified: This loss of land caused King Carol II , the king of Romania , to abdicate the throne in 1940 . The National Legionary State then came into power and shared government between Ion Antonescu and the Iron Guard .