diff --git a/emergence_lib/src/world_gen/mod.rs b/emergence_lib/src/world_gen/mod.rs
index 8c25f430d..3bfa689ad 100644
--- a/emergence_lib/src/world_gen/mod.rs
+++ b/emergence_lib/src/world_gen/mod.rs
@@ -5,9 +5,9 @@ use crate::structures::structure_manifest::Structure;
 use crate::terrain::terrain_manifest::Terrain;
 use crate::units::unit_manifest::Unit;
 use crate::utils::noise::SimplexSettings;
-use crate::world_gen::structure_generation::{
-    generate_structures, generate_units, randomize_starting_organisms,
-};
+use crate::world_gen::structure_generation::generate_structures;
+use crate::world_gen::unit_generation::{generate_units, randomize_starting_organisms};
+
 use crate::world_gen::terrain_generation::{
     generate_landmarks, generate_terrain, initialize_water_table,
 };
@@ -18,6 +18,7 @@ use bevy_framepace::{FramepaceSettings, Limiter};
 
 mod structure_generation;
 mod terrain_generation;
+mod unit_generation;
 
 /// Generate the world.
 pub(super) struct GenerationPlugin {
diff --git a/emergence_lib/src/world_gen/structure_generation.rs b/emergence_lib/src/world_gen/structure_generation.rs
index 46cf5c894..f5cc86305 100644
--- a/emergence_lib/src/world_gen/structure_generation.rs
+++ b/emergence_lib/src/world_gen/structure_generation.rs
@@ -1,20 +1,14 @@
 //! Initializes organisms in the world.
 
-use crate::asset_management::manifest::Id;
-use crate::crafting::inventories::{CraftingState, InputInventory, OutputInventory};
-use crate::crafting::recipe::{ActiveRecipe, RecipeManifest};
 use crate::geometry::{Facing, MapGeometry};
-use crate::organisms::energy::{EnergyPool, StartingEnergy};
+use crate::organisms::energy::StartingEnergy;
 use crate::player_interaction::clipboard::ClipboardData;
 use crate::simulation::rng::GlobalRng;
 use crate::structures::commands::StructureCommandsExt;
-use crate::structures::structure_manifest::{Structure, StructureManifest};
-use crate::units::unit_assets::UnitHandles;
-use crate::units::unit_manifest::UnitManifest;
-use crate::units::UnitBundle;
+use crate::structures::structure_manifest::StructureManifest;
 
 use bevy::prelude::*;
-use rand::{thread_rng, Rng};
+use rand::Rng;
 
 use super::GenerationConfig;
 
@@ -55,73 +49,3 @@ pub(super) fn generate_structures(
         }
     }
 }
-
-/// Create starting units according to [`GenerationConfig`], and randomly place them on
-/// passable tiles.
-pub(super) fn generate_units(
-    mut commands: Commands,
-    config: Res<GenerationConfig>,
-    maybe_unit_handles: Option<Res<UnitHandles>>,
-    unit_manifest: Res<UnitManifest>,
-    map_geometry: Res<MapGeometry>,
-    mut rng: ResMut<GlobalRng>,
-) {
-    info!("Generating units...");
-
-    // Collect out so we can mutate the height map to flatten the terrain while in the loop
-    for voxel_pos in map_geometry.walkable_voxels() {
-        for (&unit_id, &chance) in &config.unit_chances {
-            if rng.gen::<f32>() < chance {
-                let unit_bundle = if let Some(ref unit_handles) = maybe_unit_handles {
-                    UnitBundle::randomized(
-                        unit_id,
-                        voxel_pos,
-                        unit_manifest.get(unit_id).clone(),
-                        unit_handles,
-                        rng.get_mut(),
-                    )
-                } else {
-                    UnitBundle::testing(
-                        unit_id,
-                        voxel_pos,
-                        unit_manifest.get(unit_id).clone(),
-                        rng.get_mut(),
-                    )
-                };
-
-                commands.spawn(unit_bundle);
-            }
-        }
-    }
-}
-
-/// Sets all the starting organisms to a random state to avoid strange synchronization issues.
-pub(super) fn randomize_starting_organisms(
-    // Energy pools for structures are randomized upon creation
-    mut energy_pool_query: Query<&mut EnergyPool, Without<Id<Structure>>>,
-    mut input_inventory_query: Query<&mut InputInventory>,
-    mut output_inventory_query: Query<&mut OutputInventory>,
-    mut crafting_state_query: Query<(&mut CraftingState, &ActiveRecipe)>,
-    recipe_manifest: Res<RecipeManifest>,
-) {
-    let rng = &mut thread_rng();
-
-    for mut energy_pool in energy_pool_query.iter_mut() {
-        energy_pool.randomize(rng)
-    }
-
-    for mut input_inventory in input_inventory_query.iter_mut() {
-        input_inventory.randomize(rng)
-    }
-
-    for mut output_inventory in output_inventory_query.iter_mut() {
-        output_inventory.randomize(rng)
-    }
-
-    for (mut crafting_state, active_recipe) in crafting_state_query.iter_mut() {
-        if let Some(recipe_id) = active_recipe.recipe_id() {
-            let recipe_data = recipe_manifest.get(*recipe_id);
-            crafting_state.randomize(rng, recipe_data);
-        }
-    }
-}
diff --git a/emergence_lib/src/world_gen/unit_generation.rs b/emergence_lib/src/world_gen/unit_generation.rs
new file mode 100644
index 000000000..cae2539c8
--- /dev/null
+++ b/emergence_lib/src/world_gen/unit_generation.rs
@@ -0,0 +1,87 @@
+//! Initializes organisms in the world.
+
+use crate::asset_management::manifest::Id;
+use crate::crafting::inventories::{CraftingState, InputInventory, OutputInventory};
+use crate::crafting::recipe::{ActiveRecipe, RecipeManifest};
+use crate::geometry::MapGeometry;
+use crate::organisms::energy::EnergyPool;
+use crate::simulation::rng::GlobalRng;
+use crate::structures::structure_manifest::Structure;
+use crate::units::unit_assets::UnitHandles;
+use crate::units::unit_manifest::UnitManifest;
+use crate::units::UnitBundle;
+
+use bevy::prelude::*;
+use rand::{thread_rng, Rng};
+
+use super::GenerationConfig;
+
+/// Create starting units according to [`GenerationConfig`], and randomly place them on
+/// passable tiles.
+pub(super) fn generate_units(
+    mut commands: Commands,
+    config: Res<GenerationConfig>,
+    maybe_unit_handles: Option<Res<UnitHandles>>,
+    unit_manifest: Res<UnitManifest>,
+    map_geometry: Res<MapGeometry>,
+    mut rng: ResMut<GlobalRng>,
+) {
+    info!("Generating units...");
+
+    // Collect out so we can mutate the height map to flatten the terrain while in the loop
+    for voxel_pos in map_geometry.walkable_voxels() {
+        for (&unit_id, &chance) in &config.unit_chances {
+            if rng.gen::<f32>() < chance {
+                let unit_bundle = if let Some(ref unit_handles) = maybe_unit_handles {
+                    UnitBundle::randomized(
+                        unit_id,
+                        voxel_pos,
+                        unit_manifest.get(unit_id).clone(),
+                        unit_handles,
+                        rng.get_mut(),
+                    )
+                } else {
+                    UnitBundle::testing(
+                        unit_id,
+                        voxel_pos,
+                        unit_manifest.get(unit_id).clone(),
+                        rng.get_mut(),
+                    )
+                };
+
+                commands.spawn(unit_bundle);
+            }
+        }
+    }
+}
+
+/// Sets all the starting organisms to a random state to avoid strange synchronization issues.
+pub(super) fn randomize_starting_organisms(
+    // Energy pools for structures are randomized upon creation
+    mut energy_pool_query: Query<&mut EnergyPool, Without<Id<Structure>>>,
+    mut input_inventory_query: Query<&mut InputInventory>,
+    mut output_inventory_query: Query<&mut OutputInventory>,
+    mut crafting_state_query: Query<(&mut CraftingState, &ActiveRecipe)>,
+    recipe_manifest: Res<RecipeManifest>,
+) {
+    let rng = &mut thread_rng();
+
+    for mut energy_pool in energy_pool_query.iter_mut() {
+        energy_pool.randomize(rng)
+    }
+
+    for mut input_inventory in input_inventory_query.iter_mut() {
+        input_inventory.randomize(rng)
+    }
+
+    for mut output_inventory in output_inventory_query.iter_mut() {
+        output_inventory.randomize(rng)
+    }
+
+    for (mut crafting_state, active_recipe) in crafting_state_query.iter_mut() {
+        if let Some(recipe_id) = active_recipe.recipe_id() {
+            let recipe_data = recipe_manifest.get(*recipe_id);
+            crafting_state.randomize(rng, recipe_data);
+        }
+    }
+}