Well, there are many variants that can easily be mixed up.
The French fortresses had already before the war the Fairlie/Pechot-Bourdon type of articulated locos. During the war most of them were built by Baldwin.
The British started in a haste by taking a standard 0-6-0 Hunslet design and lengthened it by adding a forward truck/bogie, quite original! But it was well liked, but way too few.
Ordering more 4-6-0 from Baldwin, this company took a very similar design they already had for the French military lines in Morocco (one of the largest 600mm/2" networks, about 1300 miles!), simplified it and built it in large numbers. Not very popular, prone to derail, but Baldwin built a lot of them.
http://www.warofficehunslet.org.uk/ Hunslet on the right, Baldwin on the left.
The British ordered more locos from Alco, they came out with a 2-6-2 outside framed tank. Really good locos. After the war most found their way to the colonies. Only three survived in France (one now on Ffestiniog).
http://www.heeresfeldbahn.de/lokomotiven/england/alco_2-6-2t/index.htmlWhen the US entered the war your army ordered more 2-6-2 from Baldwin. But they modified their 4-6-0 design and built a 2-6-2 with inside frames, not as good as the Alcos. A fair number of these inside framed 2-6-2 were built by Davenport.
http://www.railroad-line.com/forum/topic.asp?TOPIC_ID=41442 One Davenport preserved in Fort Benning.
The locos in the Sandstone brochure are one US Baldwin inside framed 2-6-2 and a British (LDR) Baldwin 4-6-0.
Baldwin also built a number of 0-6-0 saddle tanks for France.
