This is not about the phrase, so things that are only mentions of it, and variations on it, are not examples.
Basically this is when people are willing to fight to the death for freedom. Sometimes they actually do end up dying for it, but this trope is solely about being willing to die for freedom, regardless of the result. Expect a Rousing Speech or two.
Can overlap with I Die Free when those [...] [tvtropes.org]