How did humans redefine courage in sci-fi war stories (HFY)?

In many HFY science fiction stories, humans are not the strongest species in the galaxy. Aliens often believe courage comes from size, weapons, or physical power. Humans appear small, fragile, and dependent on technology, so they are underestimated. This is where HFY stories become interesting. Humans redefine courage not as strength, but as choice. Even when afraid, humans move forward. Even when injured, they protect others. War forces humans to adapt, plan smarter, and work together, turning intelligence and emotion into advantages.

What shocks alien civilizations most is human sacrifice and unity. In HFY stories, humans willingly risk or give their lives to save others, something many alien species cannot understand. Humans fight best in groups, where hope, trust, and shared purpose multiply their courage. Over time, alien records change. Humans are no longer labeled weak, but dangerous, because their courage cannot be measured by weapons or size. HFY stories use this idea to show that true courage comes from heart, emotion, and the willingness to stand together, even against impossible odds.