Complex sentence: For the remainder of 1241 the mongols raided throughout central and eastern Hungary leveling towns and villages and destroying farms, and preparing for a campaign against Western Europe by crossing the frozen Danube river and for the attack on Vienna.
Split into simpler sentences: For the remainder of 1241 the mongols raided throughout central and eastern Hungary leveling towns and villages and destroying farms. The Mongol is preparing for a campaign against Western Europe by crossing the frozen Danube river and preparing a attack on Vienna.