Our Assault rulebook, first released in 2021 with the module Red Horizon 41 (rules version 1.0), set some exciting milestones and brought fresh ideas into the world of tactical conflict simulations. But we don’t want to just sit back and celebrate what’s been achieved. Assault is very much alive – shaped by your feedback, inspired by all our ideas, and driven by the wish to create a great and lasting gaming experience together.

With Sicily 43, we moved on to rules version 2.0, which already included lots of input from the community and new ideas to make Assault even better.
Now it’s time for the next step: version 2.5. Here you can find the current official draft of v2.5. This version will be part of the upcoming Red Horizon 41 – Revised Edition. To keep things clear and transparent, we’ll be maintaining a changelog of all updates from now on.
Assault Rulebook
CHANGELOG V2.0 à V2.5, issue date: 24/09/2025
| Chapter | Change | Comment |
| General | Repeated and redundant sentences for actions that require command points and command card effects have been deleted. For e.g.: – This is not a free action -If playing with command points, one command point i is needed. – A command card can modify the attack roll or defense roll. This knowledge should be common sense for players using the optoinal rules for cp´s and cc´s | |
| General | Updated to new grafic files And RH41 relevant wording – look & feel | Still changes to do for a final book! |
| 4.14. Wreck Markers | added | |
| 6.3 Support phase (overview) | added procedure for Step 1 and Step 2 TAS/OAS cards activation | |
| 6.4 Action Phase (overview) | added optional rule for spending command points (cp) | |
| 6.5 Organization Phase | added optional rule for removing suppression | |
| 7.1 Indirect Fire | re-structured General change to all unit cards (not OAS) with indirect fire ability (e.g. mortars): Delete sentence with: „The defender loses ist weakest terrain defense die“ | |
| 7.2 Firing Smoke | re-structured | |
| 8.1 Passing | Changed rule for passing | |
| 8.2 Reaction Fire: | added info at move&fire | |
| 8.4 After Reaction by inactive player | Deleted: Integrated in 8.2 | |
| 9.1 Normal Movement | example pic terrain movement costs deleted | |
| 9.2 Fast Movement | Vehicles fast action + blue die | |
| 9.3 Moving and firing | Added: The defender receives a green die defense bonus when the attacker performs either of these actions. Changed marker pics to: Move&Fire, Fire&Move, Turret Fire, Fast Action | |
| 9.4. Terrain Movement Costs | changed to Terrain Characteristics – re-written Added: 9.4.1 Impact on movement, 9.4.2 Impact on defense dice, 9.4.3 Terrain hex elevation, 9.4.4 Impact on LOS | |
| 9.6. Special Terrain Types | Numbering changed to 9.5 | |
| 9.6.2 Buildings | changed to 9.5.2 and re-written | |
| 9.5 Harsh Terrain | hanged to 9.4.5 (The subsequent chapter numbers in 9.5 Special Terrain have been adjusted.) | |
| 9.6.3 Roads and trails | changed to 9.5.3 and re-written | |
| 9.6.4 Alleys | changed to 9.5.4 and re-written | |
| 9.6.5 Urban Alleys | changed to 9.5.5 and re-written | |
| 9.6.6 Covered Trails | changed to 9.6.6 and re-written | |
| 9.6.4 Fortifications | Re-numbering to 9.5.7 invl. subsequent chapters Re-written incl. Sandbags, Trenches, Gun Position, Bunker, Pillbox, | |
| 9.6.5 Obstacles | Re-numbering to 9.5.8 invl. subsequent chapters Re-written incl. Subsequent chapters Added Wrecks Chapter 9.5.8.5. | |
| 9.6.6 Minefields | Re-numbering to 9.5.9 Minor changes in effect column of damage table | |
| 9.10.1 and 9.10.2 Damage to vehicle units from terrain | Chapter / rules deleted | |
| 10.0 Ranged Fire | Changed marker pis to new ones | |
| 10.2 Line of Sight (LOS) | Re-structured | |
| 10.3 Checking LOS | Re-structured and added chapter: 10.3.1 Terrain and LOS 10.3.2 Clear, hindered or blocked LOS 10.3.3 LOS along hexsides | |
| 10.4 Elevation and LOS | Re-structured | |
| 10.5. Direct Fire spotting | Re-written Rules change to failed spotting roll | |
| 10.5.1 Automatic direct fire spotting | Re-structured | |
| 10.7.3 Assinging Damage | Re-structured and re-written to: 10.8 Assigning Damage 10.8.1 Critical Hits 10.8.1.1. Critical hits vs infantry and artillery 10.8.1.2. Critical hits vs vehicles 10.8.1.3. Criticla hits vs. Buildings 10.8.2 Damage points 10.8.3. Suppression 10.8.4. Elimination | |
| 10.8. Attack dice | Number change to 10.9 incl. Subsequent chapters | |
| 10.8.4 Joint Fire | Number change to 10.9.4 – Rules change: joint fire limited to infantry units only | |
| 10.9. Defense dice in ranged fire | Number change to 10.10. incl. Subsequent chapters | |
| 10.9.1 Terrain defense dice | Number change to 10.10.1 Rules change: added reference to 9.4 Terrain Characteristics and examples | |
| 10.9.2 Hindered LOS to target unit | Number change to 10.10.2 added defender strongest terrain die – Reference to 9.4.4 and one example | |
| 10.9.4 Attacker´s Fire Status | Number change to 10.10.4 Rules change: explaining the new action status markers with modification to defense dice. This information is also depicted on the status markers in the form of a shield (see 13) | |
| 10.9.5. Ranged fire modification table | Chapter – rule deleted. Not needed because of new status markers showing modification to defense dice | |
| 10.9.6 Defender´s Status | Number change to 10.10.6 | |
| 10.10. Ranged fire on vehicles transporting units | Numbering change to 10.11. incl. Subsequent chapters | |
| 10.10.2 Eliminated/criticial hits on transports | Rules change: last para changed from flipped damage to one damage poin | |
| 11.0 Close combat | re-organized and re-written rules | |
| 11.6 Close combat example | Re-written | |
| 12.4.3.2 OAS Impact area | Added note for scout ability | |
| 13.0 Summary of status markers and their effects | updated the organization phase procedure according to 6.5. | |
| 13.1 General status markers | Changed entry sentence Deleted sentence in line with new 11.0: If the defending unit is marked with ambush, then it may add one additional green attack die in this initial close combat round. | |
| 13.3 Morale status markers | added Suppressed while moving and overstacked changed fallback description and rules |