Mormon 4:1

And now it came to pass that in the three hundred and sixty and third year, the Nephites did go up with their armies to battle against the Lamanites, out of the land Desolation.

In the year 363, the Nephites went with their armies to fight the Lamanites out of the land Desolation.

In year 363, the Nephites marched out of Desolation to attack the Lamanites.