Why would posters and music not be allowed into the country of Iran?
During the 1979 Islamic Revolution everything was heavily based on religion. Lots of things were banned in the country that were not related to Islamic fundamentalism, which prohibits alcohol, games, music, posters, and other things. To this day alcohol is banned in Iran, yet there are over 200,000 people addicted to alcohol there (Alcohol In Iran - Wikipedia). Western music and some other types of music are also not allowed in the country. Women are not allowed to wear tight clothing and are obliged to follow commands given by their husbands. These are all rules and are strictly forbidden to be broken.
Why does this situation exist? I think that initially is is the attempt of religious rulers to control bad influences that can come from these things. For example, when abused alcohol is a huge negative influence around the world that ruins lives. But, has Iran's attempt to control it through a ban worked? Obviously not. Do the other bans on music, games and posters work? With the internet and social media, probably not. It is well known that Iranians have access to all these things.
Why did the Guardians of the Revolution Woman's Branch exist?
The Woman's Branch was created in 1982 to arrest women who were improperly veiled. These women patrolled the streets looking for other woman who did not wear their veils correctly, or were improperly dressed in other ways. This was quite smart of the rulers, because they let women who were fundamentalists enforce these rules, not men. Their ulterior motive was also to make sure that clothes advertising western cultural influence (i.e., Michael Jackson) were not worn in public.
What were the causes of the Iran Iraq war?
As soon as the Iranian Revolution Happened Iraq invaded Iran because they were afraid the revolution would destabilize their country. The conflict lasted from 1980-1988. Both sides lost lives and economic damage. Half a million deaths in 8 years with no reparations or changes to either side. This war was mainly compared to World War 1 because of the tactics used like trench warfare, human wave attacks, and chemical warfare. An overall awful war bringing both death and fear.