Cicero (106 BC-43 BC) is said to have been <em>the greatest of all Roman orators.</em> He lived during the <em>rise and fall of the Roman Empire</em>. He was an active participant in the most significant political events during that period. He believed that a good orator should be able to talk about the most <em>diverse </em>topics - for this, he should have acquired a lot of <em>knowledge</em>.
Almost always, it is a "B. Joint Command" that has line authority to oversee the management of multiple incidents being handled by separate Incident Command organizations, since this is a "joint effort".