Dragoons serve primarily as mobile anti-air defense. It is more economical to have zealots take the brunt of fighting enemy ground units whenever possible. Compared to zealots, the dragoon fires slower and has an attack optimized against only large-sized units. The relationship is similar to that between marines and goliaths. Due to their large size and somewhat slower movement to the zealot, dragoons are fairly vulnerable to groups of smaller units such as massed zerglings and hydralisks. Despite this, many players utilize dragoons as far as a late game due to their important usage as anti-air defense and fire support.
Each dragoon occupies four out of the eight slots on a shuttle.
Dragoons possessed an appearance in the StarCraft alpha identical to their end appearance. However, they were armed with fusion cannons instead of phase disruptors. During this period, they were called "Templar."