Complex sentence: In 1643 a general obligation was imposed on Oxford colleges to support the Royalist cause in the English Civil War, the King called for Oriel's plate and almost all of it was given, the total weighing.
Split into simpler sentences: In 1643 a general obligation was imposed on Oxford colleges to support the Royalist cause in the English Civil War. The King called for Oriel's plate, and almost all of it was given, the total weighing.