A long sword dance is when people dance with long, skinny swords. It's a tradition that has been around for a very long time and is still done today in some places.
During the dance, everyone holds a sword and they move around in a certain way. They might step in a specific pattern or make certain shapes with their swords.
It's important for everyone to pay attention and work together, because the swords are very sharp and could hurt someone if they aren't careful.
People usually wear special costumes when they do this dance, and often the dance tells a story or represents something meaningful to the community.
Overall, it's a fun and special way for people to come together and celebrate their history and culture.