What effect does the metaphor have in this sentence?
The midwestern town was an outpost of northeastern radical thought, defended by shots from the town’s newspapers and reinforced by regiments of campaigners for abolition and women’s rights.
The metaphor emphasizes the aggressive nature of politics in the town.
The metaphor clarifies that people from another region had taken over the town.
The metaphor suggests that residents cared more about politics than about their family lives.
The metaphor shows that the citizens were organized into an armed force.
