The first inhabitants of the continent were the Children of the Forest, a nature-worshipping Stone Age anthropoid species who carved the faces of their gods in weirwood trees. Some time later, Bronze Age human settlers, known as the First Men, migrated from Essos via a land bridge at the southeastern end of the continent and gradually spread to the entire continent. The First Men's attempts to chop down forests and cultivate the land led to a millennia-long war with the Children of the Forest, that eventually was settled by an agreement known as "The Pact". This was the beginning of the Age of Heroes, during which the First Men adopted the religion of the Children of the Forest. Those gods later became known in Westeros as the Old Gods.