The event that marked the beginning of a long period of republican control is the civil war. A civil war is also known as an intrastate war. It is a war between organized groups within the same state or country or less commonly between two countries created from a formerly united state.
with a resource such as grain that was very common in egypt, trading it for resources not as common opens doors for bigger trading and more market. Wood became widely available and grain became available to others who traded in wood for it.