diff --git a/Tutorial-01-:-UI.md b/Tutorial-01-:-UI.md
index 14ae509..1d4aa8b 100644
--- a/Tutorial-01-:-UI.md
+++ b/Tutorial-01-:-UI.md
@@ -72,5 +72,15 @@ Any friendly building will also produce money for your budget every turn. So it
 
 Enemy buildings are automatically captured when the nearby airbase has been captured._
 
+## Frontlines : 
+
+![](https://imgur.com/iaKrN0x.png)
+
+The frontline let you now how close the ennemy are from you airbase.
+
+
+
+[WIP]
+