John Montagu, 4th Earl of Sandwich "invented" the sandwich. He lived from 1718 to 1792 and was First Lord of the Admiralty. Captain James Cook discovered a group of islands in the Pacific and named them after him. The Sandwich Islands belong to Hawaii today.
John Montagu, 4th Earl of Sandwich was not very popular. Corruption was a big problem at that time. So he sent out unseaworthy ships to fight for England.
John Montagu liked to play cards very much. He often played for hours and hours. So there was no time to eat. John Montagu told his butler to make something he could could eat at the gambling table. The butler put a piece of meat between two slices of bread. So the "Sandwich" was created.