To upper males, it's a call to arms.

地位高的雄性吹响战斗的号角。

But the Battle of Fort Sumter was a call to arms for both sides.

但是桑特堡之战却同时为南北双方吹响了战斗号角。

The story has become a metaphor for national weakness, and a call to arms.

这个故事成为国家弱小、渴求武器装备的隐喻。