The "Ypres map", which takes place in the First Battle Of Langemark, is 70% of the way there. This means that when I'm finished I can work on coding missions and getting voice actors ready (If you want to help with that or the missions, let me know). I have added the Village of Langemarck in the distance in the map as you can see in the images section of this mod.
To quote Wikipedia:
"The Battle of Langemarck took place from 21–24 October, after an advance by the German 4th and 6th armies which began on 19 October, as the left flank of the BEF began advancing towards Menin and Roulers. On 20 October, Langemarck, north-east of Ypres, was held by a French territorial unit and the British IV corps to the south. I Corps (Lieutenant-General Douglas Haig) was due to arrive with orders to attack on 21 October. On 21 October, it had been cloudy and attempts to reconnoitre the German positions during the afternoon had not observed any German troops movements; the arrival of four new German reserve corps was discovered by prisoner statements, wireless interception and the increasing power of German attacks; 5 1⁄2 infantry corps were now known to be north of the Lys, along with the four cavalry corps, against 7 1⁄3 British divisions and five allied cavalry divisions. The British attack made early progress but the 4th army began a series of attacks, albeit badly organised and poorly supported. The German 6th and 4th armies attacked from Armentières to Messines and Langemarck. The British IV Corps was attacked around Langemarck, where the 7th Division was able to repulse German attacks and I Corps was able to make a short advance."
I have made it somewhat historically accurate in the map but it is difficult as there are few pictures of the battle. But what pictures there are have been a big help. The trenches were right by the village, so that is accurate as well as the muddy terrain. You can view the pictures here (they are the third and fourth pictures)