diff --git a/Custom-campaigns.md b/Custom-campaigns.md
index 3f31615..4441fee 100644
--- a/Custom-campaigns.md
+++ b/Custom-campaigns.md
@@ -122,9 +122,9 @@ iads_config:
 
 How the IADS Network works is described over here: [IADS Network](#iads---integrated-air-defence-system)
 
-### Overriding SAM positions
+### Overriding Air Defense/SAM generation
 
-It is possible to override the type of Air Defense unite that will be spawned by Retribution, provided it exists in the faction, otherwise standard generation behavior will occur.
+It is possible to override the type of Air Defense unit that will be spawned by Retribution, provided it exists in the faction. If it does not, standard generation behavior will occur.
 
 The syntax is as follows in the campaign file :
 ```yaml