Complex sentence: Variants of the flame fougasse included the demi-gass was a fougasse barrel placed horizontally in the open with an explosive charge underneath that would rupture the barrel and flip it over towards the target.
Split into simpler sentences: Variants of the flame fougasse included the demi-gass. The demi-gass was a fougasse barrel placed horizontally in the open with an explosive charge underneath that would rupture the barrel and flip it over towards the target.