Official Historical Campaign "Overlord" - P51 B-5 Mustang

[Jaegermeister]

"Overlord" a Scripted Campaign for the P51B-5 Mustang in Normandy

 

 

About The Campaign

The 354th Fighter Group, commonly referred to as the "Pioneer Mustang Group" was the first USAAF unit to be equipped with the new P-51B/C Mustang during WWII and take it into combat in Europe. They flew long range escort missions across the English Channel with the 8th Air Force heavy bombers during the months leading up to D-Day. Once final preparations were made for the Invasion of Normandy, the 354^th Fighter Group was reassigned to the IX Tactical Air Command and committed to direct support of the ground troops going ashore. The 354th flew escort for C-47s dropping paratroopers and towing gliders on D-Day.

 

Your role in this campaign begins as a replacement pilot arriving with the 354^th Fighter Group on D-Day and assigned to the 356^th “Red Ass” Squadron under the command of Major Richard Turner. In mid-June 1944 the Pioneer Mustangs flew strike missions across the English Channel from ALG Lashenden during the first V-1 rocket attacks on London and were directly in the path of the “Doodlebugs” as they headed towards their intended targets. They moved to ALG-2 at Criqueville in late June where they flew ground attack, search and rescue, fighter-bomber escort and fighter sweep missions during all the major battles of Operation Overlord. After the Allied breakout at Saint-Lô, the 354^th FG was reassigned to the new XIX Tactical Air Command and moved east with Patton’s 3^rd US Army through Paris and eventually into Germany. Due to the hectic flight schedule and squadron reorganization, you will move up from wingman to element leader and finish the campaign as a flight leader.

 

This is a historically based campaign depicting real events, however, the number of planes and specific squadrons involved in the missions have been altered slightly, and some event locations have been moved for improved game play.

 

 

 Timeframe: June 17^th – August 7^th, 1944

Unit: 354^th Fighter Group, 356^th “Red Ass” Squadron

Aircraft: P51B-5

Duration: 15 Missions

Average Playtime: 10 Hours

Languages: English, Russian, Spanish, French

Author: Jay =Jaegermeister= Yarbrough

 

 

 

 

 

 

This Campaign requires IL-2 Sturmovik: Battle of Normandy - Standard Edition to play.

 

Available in the IL2 Store HERE

Available on Steam HERE

The discussion of this Scripted Campaign on the old forum is here:

Overlord Campaign Discussion

 

Feel free to discuss the campaign or report any issues in this thread.  

Edited December 31, 2025 by Jaegermeister

[MDzmitry]

I think it would be a nice option to also link an old forum topic as reference for possible issues or questions to check whether these have already been answered 

[Jaegermeister]

1 hour ago, MDzmitry said:

I think it would be a nice option to also link an old forum topic as reference for possible issues or questions to check whether these have already been answered 

Sure, I can do that

[skitzbuckethatz]

Good Afternoon, 

I have recently started the scripted campaign Overlord. I have noticed over the beachhead I have significant performance issues. 

Essentially, the game runs perfectly fine until I reach anywhere on the Normandy coastline. I experience frame drops from 100fps to about 30fps, however the real issue is that the game begins to run in slowtime. Flying a P-51B, the roll rate almost triples, and the in-cockpit clock slows down by almost double. It is borderline unplayable. Putting timeskip into 8 doesnt change it at all. 

I have seen other threads about the performance issues in Normandy, but they tended to be hardware related. My PC is more than capable of running the game on Ultra settings.

Keeping task manager open on 2nd monitor while playing, I can see that my CPU usage peaks at about 15%. 

I also have zero modifications to the game.

Specs:

• CPU - Ryzen 7 5700X3D
• GPU - RTX 5060ti 16GB
• RAM - 2x16GB (32GB) DDR4 3600Mhz
• MB - B450 Gaming Plus Max

Unfortunately I cannot lower the density of ground forces as it is a scripted campaign. 

These two videos from an older thread perfectly display what I am experiencing - first video normal, second video is the issue.

 

Any advice would be appreciated because other than this I am enjoying it.

[LuftManu]

Hi,

The slowdown you’re experiencing is caused by the AI workload exceeding the CPU’s processing capacity, which forces the engine to reduce the simulation tick rate. This behavior is independent of rendering performance (FPS).

The limitation is not purely hardware-related, but rather a consequence of how the game engine schedules and executes AI logic on the CPU, particularly its reliance on main-thread performance.

In highly complex missions, the critical factor is high IPC and strong single-core performance, as AI calculations are largely serialized. In this context, 3D V-Cache provides little to no benefit, since it primarily improves frame rendering throughput rather than simulation or AI processing.

With a Ryzen 7 5700X3D, the CPU’s cache advantage helps FPS, but its single-core IPC and clock speeds become the bottleneck for large-scale AI simulations.

I experienced this with my 9800 X3D. If +200, Ill have more margins.
And, on my other Intel system, a 285K which performs like a 30% worse in FPS, there is even more capabilties to increase the number of units.

Try to reduce the number of units and it will be fixed! 
Scenario distance won't matter. (In game Settings) it only affects the area around you which is being createad and only adds to VRAM.

[skitzbuckethatz]

On 12/28/2025 at 11:46 PM, LuftManu said:

Try to reduce the number of units and it will be fixed! 
Scenario distance won't matter. (In game Settings) it only affects the area around you which is being createad and only adds to VRAM.

Thanks for the detailed reply and explanation. However given that this is a scripted campaign, there is no option to reduce the number of units. Do I just have to tough it out for this one?

[AndreiTomescu]

Hello, @skitzbuckethatz mate!

I have some bad and also good news 🙂

 Bad:

- your CPU, which is almost my CPU (Ryzen 7 5700G, which is a bit worse) we have poor single core processing. And the game does only single core use, which is lame, but that's it. 15% usage on a 8 core cpu is a full house on the single core used, since the usage monitor sees the CPU as a hole, not individual core items.

- from all the scripted campaigns i've done, and that are all excluding those with Russian build birds, in only 2 i've experienced this slow downs, and those are exactly this really awesome and thrilling Jaggermeister's Overlord and Walter's Lost Hope.

- there is no workaround with game settings, 😞 

Good:

- in Overlord, i've only experienced this issue in about 3 missions, forgot which ones exactly, and wasn't like mission breaking

- What i did (i'll put it short, you ask for more details if you need):

       - install AMD Ryzen Master software and run the software in the background BEFORE launching the game

       - determine what CPU core is used by ingame engine (or you can overclock them all! but i didn't)

       - overclock the cpu core used by the game (basically automatic process, you don't have to know much about temps, currents and voltages)

       - you'll see a mild improvment, but noticeable

       - don't forget to set the CPU core/cores to normal afterwards, as the standard cooling is NOT suited for  prolonged overclocking ! that's why i overclocked only one core, as to reduce heat in the hole CPU

        - setting (from BIOS) the CPU cores to avoid going into sleep state doesn't give you any improvement

Hope this helps.....

[Jaegermeister]

Or I could just reduce the number of ships and landing craft offshore because it’s just scenery anyway.

[sandmarken]

1 hour ago, Jaegermeister said:

Or I could just reduce the number of ships and landing craft offshore because it’s just scenery anyway.

You already made sure that by the time you see action in the air, those units are discreetly deactivated and the game runs smoothly again. I have a pretty old system and play VR. I have some frame drops, but the campaign is great, and I enjoyed it a lot! The scenery around d day is the only time in game you see something that resemble a real landing force! 

[Jaegermeister]

10 hours ago, sandmarken said:

You already made sure that by the time you see action in the air, those units are discreetly deactivated and the game runs smoothly again. I have a pretty old system and play VR. I have some frame drops, but the campaign is great, and I enjoyed it a lot! The scenery around d day is the only time in game you see something that resemble a real landing force! 

That's true. It does not have any effect on game play.

[skitzbuckethatz]

On 12/30/2025 at 7:08 PM, AndreiTomescu said:

       - overclock the cpu core used by the game (basically automatic process, you don't have to know much about temps, currents and voltages)

Thanks mate. Unfortunately you cant overclock an X3D CPU so im just going to have to put up with it haha.

[kalerider1]

This is outstanding. Another great campaign Jaeger. I learned to love the Mustang.

[AndreiTomescu]

yes, yes indeed ! this is an awesome campaign, and somehow the closest D-day reenactment i've seen in campaigns so far.

Also Jaggermeister's Mosquito campaign, Gestapo hunters, has a couple D-day inspired stuff.

2 hours ago, kalerider1 said:

I learned to love the Mustang.

and a true love that is. My Mustang fall-in-love was with the Lullaby for a Dream campaign, maybe you could try that too.

[sandmarken]

1 hour ago, AndreiTomescu said:

D-day reenactment i've seen in campaigns so far.

I agree! My computer kneels every time I fly over, totally worth it!

[AndreiTomescu]

On 1/2/2026 at 12:35 AM, skitzbuckethatz said:

Unfortunately you cant overclock an X3D CPU

as i learned the ropes of overclocking my Ryzen 7 5700G (for Korea !! 🙂 ) i found out that yes, indeed,  5800X3D and 7800X3D have fixed multiplier and cannot be overclocked, but! can be undervolted, ant that in my experience actually brings large benefit as allows the max clock to boost longer and even higher in those moments during an intense mission.

[jokash]

Mission 5 "Needle in haystack"...how was i supposed to know the pilot is on land? The search area is on the sea,and picture of mission is of some speedboat,and briefing talks how might be shark food,i didn't get the idea that he is on land actually.

[Jaegermeister]

On 3/8/2026 at 4:15 PM, jokash said:

Mission 5 "Needle in haystack"...how was i supposed to know the pilot is on land? The search area is on the sea,and picture of mission is of some speedboat,and briefing talks how might be shark food,i didn't get the idea that he is on land actually.

Your target is not on land, it is in the search area designated on the map

 

Edited March 16 by Jaegermeister

[jokash]

well bonehead AI chatbot told me its on land:

Where to Find the Downed Spitfire Pilot

📌 General Location

• The pilot is on the ground, not far from the crash site.
• He is typically found east or southeast of the search circle, not dead‑center.
• Look for:

• A small patch of open field
• A hedgerow or tree line
• A faint smoke marker (sometimes hard to see depending on weather/graphics)

🎯 How to Spot Him

• Fly low and slow (150–200 km/h).
• Use external view if you allow it, or circle tightly at low altitude.
• The pilot model is small — he may appear as:

• A standing or crouched figure
• Next to a parachute bundle
• Near a small smoke plume

[AndreiTomescu]

Well, not to be a donkey 🙂 , but i actually remember this mission, since I LOVE, adore, rescue missions. 

(They are so few....Overlord has this, Little Brother has two-one on a tiny island-, War in the Channel one, Fire and Ice also has one on land)

So, as far as I remember, in Overlord campaign the downed pilot is in an orange raft, at sea.

[Jaegermeister]

53 minutes ago, jokash said:

well bonehead AI chatbot told me its on land:

 

Where to Find the Downed Spitfire Pilot

📌 General Location

• The pilot is on the ground, not far from the crash site.
• He is typically found east or southeast of the search circle, not dead‑center.
• Look for:

• A small patch of open field
• A hedgerow or tree line
• A faint smoke marker (sometimes hard to see depending on weather/graphics)

🎯 How to Spot Him

• Fly low and slow (150–200 km/h).
• Use external view if you allow it, or circle tightly at low altitude.
• The pilot model is small — he may appear as:

• A standing or crouched figure
• Next to a parachute bundle
• Near a small smoke plume

 

None of this is correct.

If you actually fly the mission and follow your mission briefing, you will have an easier time than trying to look up a shortcut on the internet.

[AndreiTomescu]

17 minutes ago, AndreiTomescu said:

So, as far as I remember, in Overlord campaign the downed pilot is in an orange raft, at sea.

And also I remember that some German fast boats are trying to fetch him before our guys? You are supposed to prevent this from happening.....

I remember this strong because I kept bugging Sandmarken "why are the german boats not coming in War in the Channel rescue mission after update?" And he insisted (and was right) that that is happening in Jaegermeister's Overlord.

Anyhow, this mission is incredibly appealing, at least for me.

And this hole campaign, really my taste.

On par with that Greek Fire one. Maybe sometimes Jaegermeister will go to Greece on holidays and will get the will and time to update it! 🤗😁

[jokash]

1 hour ago, Jaegermeister said:

If you actually fly the mission and follow your mission briefing, you will have an easier time than trying to look up a shortcut on the internet.

I didn't look any shortcuts, i did the mission - didn't find anything, no pilot no enemies, i circled whole area up down three times.That's why i went looking for answers online - maybe he isn't supposed to be found but i suspected that was the case?

[Jaegermeister]

 

18 minutes ago, jokash said:

maybe he isn't supposed to be found but i suspected that was the case?

Mission spoiler below:

Spoiler

If you circle at low altitude (very low altitude, like below 100 meters) and look for a floating spitfire on the water, you can see it best in you fly towards the sun and look for the silhouette, or fly north to south and look over the side of your cockpit. There is also a tent I used to represent a raft and pilot, since those are not available in the game as objects. If you fire a flare when you are near the floating Spitfire, you will get some reactions and further events to occur. From memory, I recall that it is slightly to the northeast of the waypoint, but not far. I have given at least 1 person who didn't believe me the map coordinates just to prove it is there, but that really does spoil the mission.

It is there, it just goes to show you how hard air-sea rescue really was or is. No one said it would be easy.

[jokash]

I had my cockpit open,flew slow,went near the coast, far from coast.Maybe il give it another go, see how he actually looks.

[Jaegermeister]

37 minutes ago, jokash said:

Maybe il give it another go, see how he actually looks.

Complete Mission Spoiler below if you are still having trouble....

 

Spoiler

Map Grid 2214-8