Southern Theater
When we read into this chapter we're gettin a description of this Theater first - which I missed in the case of the Western -, and it's possible military usage.
The definition is many layered: geographical, cultural, and historical (the latter two often inseparable).
It is the clashing zone of the cultures of Europe, Asia, and Africa. Here encountered Greek-Europe and Persian-Asia, Roman-Europe and Semite-Punnic-Africa, Gothic-Europe and Semite-Moorish-Africa, Frankish-Europe and Semite-Moorish-Africa, Christian-Europe and Islamic-Turanic-Asia. In the struggles between the last two this region was annexed into the lebensraum of Europe, and after the exploration of America has ended, it got back it's old importance.

Updated the Strategic Space of Europe.