Complex sentence: In any case, there was not enough artillery, but new pieces could not be brought in because it was very difficult to move them over land, and there was not enough ice to bring them the same was the original cannon came.
Split into simpler sentences: In any case, there was not enough artillery, but new pieces could not be brought in. This was because it was very difficult to move them over land, and there was not enough ice to bring them the same way the original cannon came.