This was done to make come true what the prophet Isaiah had said,
"Land of Zebulun and land of Naphtali, 1 on the road to the sea, on the other side of the Jordan, Galilee, land of the Gentiles!
References for Matthew 4:15
4.15, 16 Is 9.1, 2.
The people who live in darkness will see a great light. On those who live in the dark land of death the light will shine."