Tympanomastoid surgery is needed for the chronic draining ear or in the case of a cholesteatoma. This surgery involves the middle ear space as well as the mastoid and usually the incision may be through the tympanic membrane (eardrum) or behind the ear. 1 = Mastoid Bone 2 = Middle Ear 3 = Tympanic membrane (eardrum).his surgery involves the middle ear space as well as the mastoid and usually the incision may be through the tympanic membrane (eardrum) or behind the ear. 1 = Mastoid Bone 2 = Middle Ear 3 = Tympanic membrane (eardrum).
After WW1, they built the Maginot Line, along their border with Germany. This was a massive defensive fortifiations with underground bunkers that could be used for troops and support and command and control. In 1940, the Germans defeated this defensive line by attacking through Belgium and going around it.
Allied Occupation of Germany, 1945-52. After Germany's defeat in the Second World War, the four main allies in Europe-the United States, Great Britain, the Soviet Union, and France-took part in a joint occupation of the German state.llied Occupation of Germany, 1945-52. After Germany's defeat in the Second World War, the four main allies in Europe-the United States, Great Britain, the Soviet Union, and France-took part in a joint occupation of the German state.