As of May 2014, the price of a Forever stamp costs 49 cents. This  price comes after several price increases of stamps. It was last  known to cost 46 cents.
A trench is a type of excavation or depression in the ground that is generally deeper than it is wide (as opposed to a wider gully, or ditch), and narrow compared with its length (as opposed to a simple hole). In geology, trenches are created as a result of erosion by rivers or by geological movement of tectonic plates. In the civil engineering field, trenches are often created to install underground infrastructure or utilities (such as gas mains, water mains or telephone lines), or later to access these installations. Trenches have also often been dug for military defensive purposes.
Definition of guerrilla. : a person who engages in irregular warfare especially as a member of an independent unit carrying out harassment and sabotage (see sabotage 2) Guerrillas controlled half the country.