In the current Ukraine war much is made of the fact that the Russians are held to the roads and if the ground was better they would do better. Wide sweeping movements off road seems to be a myth that never dies and the gains are not easily understood by me.
In mobile warfare there is little time to dig in its all about time and space. If an aggressor decides to go "off road" and can what are his gains/
1) The theory is he can outflank the enemy. If the enemy is immobile that may be the case. However even now looking at Ukraine around the area of Torśke, Donetsk Oblast, Ukraine noted as an area of fighting on April 20th
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Its not clear terrain, so any sweeping move will be slow 12 to 14kph (a bit less then 10 mph) as opposed to a road move of say twice that at least and it may be less if there are significant obstacles like streams or soft ground. As both sides are slowed down seems to me the defender has the edge as in a large area he can disperse and the enemy has to disperse to follow losing momentum and cohesion.
Second after a few hours the attacker will need to re-arm. His supply's will also need to be off road so will be slower or can provide less with the same trucks. Attackers supply needs will be higher than a defenders so again it looks no disadvantage for the defender to have a wider area to deploy.
I welcome a critique of these statements as to why they are incorrect.
PS does anybody have data on the intravisibility ( The military term is intervisibility (IV) line. These are relatively minor and often very subtle variations in terrain that mask observation from one side to another. On one side of the line you cannot see, or be seen by, the other.) for Ukraine in the area. I have assumed that of Norther Europe so Javelins will normally be within range if it can see a target, so distance shooting off road would seem to be unaffected.
This is all key stuff if you want a plausible tabletop simulation.