Original: Besides those two regions , the historical region of Tyrol for many centuries also included the southern part of Tyrol and the historical region of Welschtirol , which were annexed by Italy after World War I. By that , North Tyrol and East Tyrol were effectively cut off from each other .
Simplified: Besides those two regions , the historical region of Tyrol for many centuries also included the areas today known as Bolzano-Bozen and Trento , which were annexed by Italy after World War I. By that , North Tyrol and East Tyrol were effectively cut of from each other .