The Raven Kingdom had a wall that circled around the country like a box at the borders of their nation which was formed after the Blood Bridge treaty known as the 'The Raven Cloud.'
The Dominion of Carmine known as the Demon realm formed a great wall after Demon lord Iris took control and built a wall covering the city which was known as 'The Great Wall of Dominion.'
The Humans were less after the war ended only numbering in five thousands so they had a magic barrier which was later lost during the invasion they suffered at the hands of Krelm Freed, in the new kingdom the walls were named 'The Wall of Freed.'