It says under the movement plans "Note currant fatigue penalty is -30".
Doh... missed that. Then that means the following combinations (set for 5 hours to assault) have the following effect:
[] Do not rest before advancing- This will allow you to reach the city sooner but your troops fatigue will reduce their combat efficiency by a significant amount.
[] Advance at a slow and careful pace(4km/h) – Takes seven and a half hours to reach combat range of city, one and a quarter for the Basilisks to get into range. Reduces chance of running afoul of minefields or ambushes and reduces fatigue penalty by 5.
= -25 penalty
[] Rest for two hours before advancing (Reduces fatigue penalty by 12)- This would provide your troops with a decent rest without overly slowing your advance.
[] Advance at a moderate pace (6km/h) – Takes five hours to reach combat range of the city, one for the Basilisks to get into range. No effect on fatigue or ambush spotting.
= -18 penalty
[] Rest for three hours before advancing (Reduces fatigue penalty by 18)- This would give your men time to have a good rest but force you to advance at a fast pace to make it to the city in time.
[] Advance at a fast past (8km/h)- Takes three and three quarters hours to reach combat range of the city, forty minutes for the Basilisks to get into range. Increases chance of running afoul of minefields or ambushes and increase fatigue penalty by 5.
= -17 penalty
[] Rest for four hours before advancing (Reduces fatigue penalty by 24)- Your forces would be able to catch up on missing sleep and rest enough to mostly recover from their recent forced march. On the other hand they would be forced to advance at a very fast pace to reach the city in time.
[] Advance at a very fast pace (12km/h)- Takes two and a half hours to reach combat range of the city, forty minutes for the Basilisks to get into range. Greatly increases chance of running afoul of minefields or ambushes and increase fatigue penalty by 10.
= -16 penalty
[] Rest for five hours before advancing (Reduces fatigue penalty by 30)- Your forces would be able to totally recover from the forced march but would be need to advanced at a very fast pace to reach the city in time and even then you would only have four and a half hours before dark.
[] Advance at a very fast pace (12km/h)- Takes two and a half hours to reach combat range of the city, forty minutes for the Basilisks to get into range. Greatly increases chance of running afoul of minefields or ambushes and increase fatigue penalty by 10.
= -10 penalty but short on amount of time to attack.
[] Rest for one day before advancing (Removes fatigue penalty )- While this would force you to endure another day of macrocannon bombardment you could ensure that you are well rested tomorrow and will be able to advance at the break of dawn.
[] Advance at a slow and careful pace(4km/h) – Takes seven and a half hours to reach combat range of city, one and a quarter for the Basilisks to get into range. Reduces chance of running afoul of minefields or ambushes and reduces fatigue penalty by 5.
[] Advance at a moderate pace (6km/h) – Takes five hours to reach combat range of the city, one for the Basilisks to get into range. No effect on fatigue or ambush spotting.
= Zero penalty, plenty of time, but one day more of macrocannon fire.
Seriously the wait a whole day looks like it might be the best option.
Unless you all think 3 to 6 million troops is less than we would lose with a -18 penalty (the next best solution)