Here are three great Civil War relic hunting videos produced by the Minelab company. Minelab makes some fine detectors and these videos are more or less infomercials but still quite interesting. The videos include some interesting discussion about some of the relics discovered as well as CW campsites. The detectors featured in these videos are using pulse induction technology which is quite different from the VLF (very low frequency) technology most detectors run on. The PI machines are also quite a bit more expensive but generally operate better in highly mineralized soils and can "see" deeper targets.