Board Thread:General Mod Discussion/@comment-38802091-20190909041546/@comment-32705314-20191028072731

My best guess is this; Pelargir in the history of Gondor was an important city. It served as the home of Gondor's navy during it's height and before that was the haven of the Numenoreans when they were exploring the region. It has a history longer than the Minas Tirith and Osgiliath and is probably the oldest part of Gondor. It make sense that it is itself separate than the rest of Lebennin, because the significance of Pelargir is much greater than that of Lebennin.

 @Pumpkinator