Place it at the start of a spawn sequence, before a Pop Sound Effect marks the arrival, and follow it with Enemy Spotted Sound Effect when an opponent appears nearby.
About this sound
This is the bright, rising chime heard in Age of Empires II when a villager is trained at the Town Center, lasting just over a second. Its clean, metallic ring feels cheerful and satisfying, like progress starting and a settlement coming to life. Spanish-speaking players call the unit an aldeano, and the cue has become a familiar signal for spawning, building and beginning work in strategy videos.