Fortifications are militaryconstructions designed for defensivewarfare. They have been used for many thousands of years, in a variety of increasingly complex designs. The practice of improving an area's defense is also known as "fortification". Many military installations are known as forts, although they are not always "fortified".
... - the aim of working within the Democratic Party and pulling it to the Left (pretty much the Trotskyist idea of "entrism"). The left-wing of the SPA, or the Debs Caucus, ...