message: Dragoons are immune to first strikes
diff: <bMilitarySupport>1</bMilitarySupport>
  <bMilitaryProduction>1</bMilitaryProduction>
  <bPillage>1</bPillage>
  + <bFirstStrikeImmune>1</bFirstStrikeImmune>
  <bNoDefensiveBonus>1</bNoDefensiveBonus>
  <bIgnoreBuildingDefense>1</bIgnoreBuildingDefense>
  <UnitClassUpgrades>
  <bMilitarySupport>1</bMilitarySupport>
  <bMilitaryProduction>1</bMilitaryProduction>
  <bPillage>1</bPillage>
  + <bFirstStrikeImmune>1</bFirstStrikeImmune>
  <bNoDefensiveBonus>1</bNoDefensiveBonus>
  <bIgnoreBuildingDefense>1</bIgnoreBuildingDefense>
  <UnitClassUpgrades>
  <bMilitarySupport>1</bMilitarySupport>
  <bMilitaryProduction>1</bMilitaryProduction>
  <bPillage>1</bPillage>
  + <bFirstStrikeImmune>1</bFirstStrikeImmune>
  <bNoDefensiveBonus>1</bNoDefensiveBonus>
  <bIgnoreBuildingDefense>1</bIgnoreBuildingDefense>
  <UnitClassUpgrades>
  