Warlord Games 
Bolt Action: Tank War [PDF ebook] 

Tank War, the new supplement for Bolt Action, gives players the option to expand their games to a whole new level armoured warfare. Recreate such great engagements as the battle of Kursk with the scenarios, army options and special rules found in this book. Whether you want to add more armour to your existing armies or build an entirely armoured force, Tank War has you covered.