This is the end of it all. The big push has finally come and the battle is to be held at dawn. The characters recall the beginning of the war, how they joined the army and how all their friends have died.
What I love about this episode is that it handles the subject delicately. The beginning contains funny one-liners and silly acts, but as we approach towards the end, the laughter fizzles out and the ending is superb and spot-on. One has to mention the character development, especially in the case of Darling: I believe everyone was moved by his actions and words. Blackadder has always been against the war, but Baldrick and George also change their attitudes: they start out as eager soldiers but as the time comes, they are afraid of death.
This episode is a remarkable moment in TV history: it shows us the pointlessness of the war more clearly than any history teacher or any book could.