Looking for information on WWI antante (GBR/FR) steam locomotives (1435mm gauge) which ones where mostly common for the era.
If you have any drawings/pictures - please help!

[I don't know what "1435 gauge" means

I just did a short research (wiki and a few other sites) for the French steam locomotives used between 1914 and 1918.

Looking for information on WWI antante

Is it the width of the track or something like that?

With World War 1, the Royal Engineers formed its Railway Operating Division ('ROD') which commenced operations in Continental Europe in February 1916.

The ROD originally intended to use French and Belgian locomotives, but both of these countries deliberately kept their locomotives away from the Front. [Ming's underline]

Twenty-six were sent to France to be used by the ROD in World War I, all being later returned so they probably did not go too near the trenches!

A 17in ‘Coal Engine’ seen on service with the Railway Operating Division (ROD ) in France during the First World War: Soldiers pose with No.3408 at a suitable distance from the Western Front, sometime between 1914 and 1918.

The Ministry of Munitions initially borrowed some 600 locomotives from British railways for use in the Royal Engineer's Railway Operating Division for war work, the majority of them heading overseas. As the war continued and the strain on these engines and the home railways in general began to take its toll, the Ministry decided to commence locomotive construction on its own behalf and selected for this purpose the Robinson 8K design. Thus did the class 8K become one of Britain's most numerous and famous locomotive classes through the additional 521 ROD built engines.

Great Western's maid of all work, the '4300' Mogul class, was first introduced in 1911
Eleven examples of the class were transported to France during World War I in the service of the Railway Operating Division of the British Army and these were 5319 - 5326 and 5328 - 5330.

In France during September 1917, there were 546 steam locomotives, 355 petrol locomotives, 4,322 wagons, 623 miles of track in operation and 210,808 tons of supplies were carried.

Dear Viks,

It is not spelled "antante" but ENTENTE (the French word for "Understanding", pronounced more or less as you spell it).

I have seen that mis-spelled word a few times now in KotS material and it is really necessary to correct it, it looks terrible!

You can make the technically best sim in the world, but if there are embarrassing spelling mistakes in it, it will just undermine the the whole professional look you are striving for. Il-2 did that mistake, and that was why many people in the English-speaking world had a hard time taking it seriously. I REALLY hope you guys avoid the same mistakes. PLEASE use spelling software and PLEASE involve the community in ensuring good quality of the textas of the sim.

It is not great if your sim turns out to be involuntarily funny to a lot of people. suspension of disbelief goes out the window with bad or frequent spelling errors.

I know you guys are mostly geeks and computer nerds. And on top of that, you're mostly non-native speakers of English. You maybe do not attach as much importance to texts as "humanistic geeks" like myself. But it will be a very bad idea to neglect the area. So, please have somebody focus on the texts in the sim!

I asked an engineer friend VikS, a builder of locomotives: some notes on the rolling stock loans

Six feet = 1828.8mm