Egyptian nationalization of the Suez Canal during the Suez Crisis meant that "The Egyptian government took control of the canal" specifically from Great Britain.
Resources, their army, and money, were all dwindling after constant fighting.
The answer is Black Death
Shatter belt is a concept in geopolitics according to which on the political map are recognized and analyzed strategically positioned and oriented regions that are deeply internally divided and encompassed in the competition between the great powers in the geostrategic areas and spheres.
Surface is wind- driven currents. Deep water currents are caused by the masses and or temperatures in the water.