4 files changed, 25 insertions, 0 deletions
diff --git a/lib/colonial_twilight/forces.rb b/lib/colonial_twilight/forces.rb
index f2b4149..6d26dea 100644
--- a/lib/colonial_twilight/forces.rb
+++ b/lib/colonial_twilight/forces.rb
@@ -119,6 +119,13 @@ module ColonialTwilight
       update_control
     end
 
+    def activate(num)
+      raise "can't activate #{num}" if @fln_underground < num
+
+      @fln_underground -= num
+      @fln_active += num
+    end
+
     private
 
     def add_base(type, num = 1)
diff --git a/lib/colonial_twilight/spaces.rb b/lib/colonial_twilight/spaces.rb
index d85954f..83d9082 100644
--- a/lib/colonial_twilight/spaces.rb
+++ b/lib/colonial_twilight/spaces.rb
@@ -177,6 +177,10 @@ module ColonialTwilight
         raise "unknown shift direction : #{towards}"
       end
     end
+
+    def activate(num)
+      @forces.activate(num)
+    end
   end
 
   class City < Sector
diff --git a/spec/forces_spec.rb b/spec/forces_spec.rb
index ce6316f..110139e 100644
--- a/spec/forces_spec.rb
+++ b/spec/forces_spec.rb
@@ -132,6 +132,14 @@ describe ColonialTwilight::Forces do
       expect { @f.add :wrong, 1 }.to raise_error(Exception)
     end
 
+    it 'activate raise' do
+      expect { @f.activate(7) }.to raise_error(Exception)
+    end
+
+    it 'activate' do
+      expect(@f.activate(6)).to eq 13
+    end
+
     it 'data' do
       d = @f.data
       @data.keys do |k, v|
diff --git a/spec/spaces_spec.rb b/spec/spaces_spec.rb
index e1d75ca..0e05707 100644
--- a/spec/spaces_spec.rb
+++ b/spec/spaces_spec.rb
@@ -136,6 +136,12 @@ describe ColonialTwilight::Sector do
     expect(@s.resettled?).to be true
     expect(@s.pop).to eq 0
   end
+
+  it 'activate' do
+    @s.add :fln_active, 1
+    @s.add :fln_underground, 2
+    expect(@s.activate(2)).to eq 3
+  end
 end
 
 describe ColonialTwilight::City do