diff --git a/common/modifiers/00_basic_modifiers.txt b/common/modifiers/00_basic_modifiers.txt
index df2d2f62a..d0b67d1a2 100644
--- a/common/modifiers/00_basic_modifiers.txt
+++ b/common/modifiers/00_basic_modifiers.txt
@@ -1,4 +1,18 @@
 base_modifier = {
+	farmlands_attrition_mult = -0.05
+	hills_attrition_mult = 0.1
+	mountains_attrition_mult = 0.15
+	desert_attrition_mult = 0.15
+	desert_mountains_attrition_mult = 0.2
+	oasis_attrition_mult = 0.05
+	jungle_attrition_mult = 0.15
+	forest_attrition_mult = 0.1
+	taiga_attrition_mult = 0.1
+	wetlands_attrition_mult = 0.15
+	steppe_attrition_mult = 0.15
+	floodplains_attrition_mult = 0.1
+	drylands_attrition_mult = 0.05
+	terraced_hills_attrition_mult = 0.1
 }
 
 # Skill modifiers, applied to each character