What is propaganda? How does it appear in Hollywood today? Does the definition need to change?

http://www.constitution.org/col/propaganda_army.htm

This is the U.S. Army's own writ, explaining the methods of propaganda in order that it can recognize/combat enemy propaganda and to ensure its own successful propaganda.

Battle: Los Angeles is one of Columbia Pictures recent ventures. The film's budget hit an estimated 70 Million, and grossed 78 Million in its first 3 weeks.

A Marine Staff Sergeant who has just had his retirement approved goes back into the line of duty in order to assist a 2nd Lieutenant and his platoon as they fight to reclaim the city of Los Angeles from alien invaders. The entire movie is filmed from the perspective of the Marines, as they handle the trials and tribulation of being men of honor at war. The movie is filled, from beginning to end, with war movie clich├ęs and bits of military propaganda. Using the previous links and other research resources on propaganda I will analyze the film, thoroughly, and explain how it is or is not a piece of military propaganda.