Journey´s End & WW1 (By Jose Maria & Raul)

It is a book written by R. C. Sherriff in 1928 and it was first published in 1929.

It is set in the trenches at Saint-Quentin, France, in 1918, Journey's End gives an idea of the experiences of the officers of a British Army infantry company in World War I. The story plays out in the officers' dugout over four days from 18 March 1918 to 21 March 1918.

Dugouts were an important part of the trenches in the World War as they were used as an area to rest and carry out other activities such as eating. Dugouts would usually be placed 30 feet underground with concrete, wood and/or steel to withstand the shock of artillery and would have a set of stairs leading down to them.

A soldiers time in the front-line trench was usually short; from one day to a couple of weeks at a time before being relieved.On an individual level, a typical British soldier's year could be divided as follows:
15% front line
10% support line
30% reserve line
20% rest
25% other (travelling, hospital, etc.)

Here's a link for a review of the play:
http://www.dooyoo.co.uk/printed-books/journey-s-end-r-c-sherriff/1088655/