thanks! it is a good attempt and looks nice. However, i disagree slightly. Most of attacks are perfrmed by infantry units. Explosions (what seems to be of artillery) for those attacks do not fit too much and i found it too repetitive or monotone. Perhaps adding simply MG42 (machine gun) with soft explosion background could be the right way. But not sure if machinegun sounds are available.
Notice that I didn't touch this aspect. What was explosion in the original, keeps being explosion in this pack. The game triggers an explosion sound if there is combat support by artillery, which is very frequent. I only changed the characteristics of the sound. Most sounds are mixed with others, in order to be less clean (without the studio like character), made them longer and with fade out effects, to prevent abrupt interruption, added some reverberation etc.
As expressed by sPzAbt653, fire2 and explosions are played if there is artillery involved. And, repetitive or not, if there is artillery involved their sounds should in fact be heard. When an infantry/mixed unit attack "multifire hvy" is also triggered. Here you get mixed sounds, but if there is artillery support, you'll get the fire2/explosions combo also. You may be noticing it now because the sounds are longer and because your perception is directed to it, but they were already repetitive. In the real world you would, most of the time, have some firing in the background, but that is represented by the background sounds, if turned on.