What units were stationed around thr bug river?

[3mk]

Hey guys,
My Great Uncle was born in a small town near Zamosc,So I would assume that he would be part of the 9th Legions infantry but Im not sure if he was in that regiment.All I know is that he was mobilized near the Bug river when the war broke out.Could anyone help me find the names of these regiments and can I have some info on the type of uniforms they were wearing?Such as wz.36 jackets and wz.19 trousers or the other way around?
Thanks