Index: binaries/data/mods/public/simulation/data/technologies/mercenary_unit_bonus.json
===================================================================
--- /dev/null
+++ binaries/data/mods/public/simulation/data/technologies/mercenary_unit_bonus.json
@@ -0,0 +1,10 @@
+{
+	"autoResearch": true,
+	"icon": "upgrade_advanced.png",
+	"tooltip": "Mercenaries train at advanced class.",
+	"modifications": [
+			{"value": "Promotion/RequiredXp", "replace": 0},
+			{"value": "Cost/BuildTime", "multiply": 1.20}],
+
+	"affects": ["Mercenary Basic Unit"]
+}