The Great Plains include theLlano Estacado, the Panhandle,Edwards Plateau, Toyah Basin, and the Llano Uplift. It is bordered on the east by the CaprockEscarpment in the panhandle and by the Balcones Fault to the southeast. Cities in this region include Midland and Odessa, Lubbock, and Amarillo.
Some factors to which the start of WW1 can be traced are:
1) the rise of nationalism in Europe, for example among the Serbians and Bosnians
2) building of big military alliances in Europe (this is what make the conflict into a world war
3) the direct cause was the assassination of the Austrian Crown Prince Franz Ferdinand