Berwick was once a Scottish town, and gave its name to Berwickshire. Often Berwick was captured by English armies and later taken back the Scottish armies. In the fifteenth century the English took Berwick and never lost it again. Many people who live in Berwick, or who visit Berwick because it is their local large market town are Scottish.
This also used to be a very large port. It was an important commercial town that used to be marked in bold on the maps.