The ordinary meaning of nap is to doze off during the day. The secondary meaning is to be offguard. Hence the phrase Catch them napping . Flying by the nap of the earth refers to the practice of flying low to the earth (undetected by radar) to catch the enemy by surprise (or napping).
the tribunes The Tribunes were elected representatives that protected the plebeians from mistreatment. The Tribunes attended meetings of the consuls or Senate in an attempt to bring justice to the plebeians.
The Thebans decided that his two sons, Eteocles (á¼ÏÎµÎ¿ÎºÎ»á¼£Ï) and Polyneices (ÏÎ¿Î»ÏÎ½ÎµÎ¯ÎºÎ·Ï), would rule Thebes in alternate years, when Oedipus was in exile. Eteocles ruled in the first year at Thebes. However after his term ended, Eteocles refused to let his brother rule Thebes.