Sealion - 1940

Version: 1.00 (December 2006)

Engine: Battles in Italy

Turns: 40


Author: Pete_AU

Download Sealion

 Scale: 1 turn = 1 Day

Design Notes
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Operation Sea Lion

In the Summer of 1940 the Germans prepared to launch, and the British to repel, an invasion on England.

This scenario uses the actual units available in England at the time immediately following the Dunkirk evacuations and the German units slated for the invasion.

The German OOB credits go to this site: Though it has been published elsewhere.

Allied OOB was determined by researching the location of all British units in July. Units are shown at there historical locations during the period July 1 to July 3.

Allied units evacuated from Dunkirk are shown with multiple step losses and little AT capability. Historical records indicate on average units returned with just under 50% casualties and no heavy equipment. They are combat experienced though demoralized, and so have unit integrity of 80% (as opposed to Germans 100%). Some units were disbanded and merged with other units in July 1940 to help with losses from France – it is not know if this would have happened if Germany had invaded. Eg: The 1st and 5th Highland Div were combined to make the 1st Highland Div (HD), we are familiar with.

It was expected units would take 3 weeks to reform after return from Dunkirk – and so are active at the time of invasion in this game.

British territorial armies are shown with a unit integrity of 20%. These units were formed in 1939 or 1940 and had received little or no divisional training. Many remained active as territorial divisions until 1945, never leaving Britain after D-day. At the time of possible invasion they were considered ‘half trained soldiers, with 5 or 10 rounds apiece’.

Almost all the fully trained men and available arms and ammunition had been sent overseas (Middle East, Singapore, India Burma – etc, as well as France)

Other units shown were in more advanced stages of training.

LDV units (later Home Guard) were responsible for coastal defense and are tied to the coastal fortifications.

British Artillery was well organized with units able to call on Corps or Army reserves as required. The British ‘artillery’ units therefore represent HQ units areas rather than individual batteries.

German units on D-Tag start with 1 step loss to simulate some initial disorganization and losses in the crossing. This was supposed to be in secret and at night and the Germans claimed to expect 0% losses – I doubt this and have ensured a tricky day 1.

It is to be assumed the German navy is engaging the British navy on the flanks where air support and mines are having a significant detrimental effect on the British. You will see the Germans get 4 air interdictions a turn, but only 30% of the time can each be spared for use (when not available they are attacking shipping).

Allied shipping in the channel in July was actually only 4 old destroyers – so the initial German landings may well have been unopposed in the channel.

Increased allied shipping is represented by reduced supply to the captured ports in later turns.

I have taken the liberty of starting the German 6th army on the outskirts of Portsmouth. They were supposed to land prior to D-Tag and confuse the British as to the actual invasion location. There placement indicates the intention to join with the main invasion force by about turn 9.

The ‘historical’ outcome should see greater London surrounded but not taken by the end of play. This was the German intention after 3 months, and was hoped would force a surrender.

Political units represent Churchill – who was going to go down fighting on the steps of parliament. This is a tough unit that will not let you down. German political unit is Heydrich who would be head of the Gestapo and SS in Great Britain.


Download the self extracting EXE from the Run5 Scenario area. Double click on the installer and it will aim the install to C:\Matrix Games\Battles in Italy\Scenarios\Sea Lion 1940\  folder.