Thanks, CharlieCharlieC wrote
bit later than that - the experiments in tracked carriages for field artillery seem to have been around 1921-22. The idea was to reduce the ground pressure of the field piece so that it became possible to tow over soft ground. With tracked artillery tractors it was possible to tow guns over soft ground but they could be damaged if the wheels dug it. One of the earliest examples of tracked carriages were the ex-USN 7inch guns produced before
on land carriages (http://landships/landships/artillery_ar ... _Mk_2.html). I've attached an image of the tracked carriage for the 155mm M1918 (GPF) gun, I had not seen an image of the equivalent carriage for the 8inch howitzer.
Sturm78