Peaceful Penetration was a strategy developed by John Monash and the Australian Imperial Force (AIF) on the Western Front. Tried out in a series of successful raids across No Man's Land during the summer of 1918 and on a larger scale at the Battle of Le Hamel in July.
The strategy was based on the idea that heavy artillery, tanks, machine-guns and aircraft should be used to devastate a limited area of enemy territory. The infantry would then be brought up to occupy and secure the area. The success of peaceful penetration depended on carefully planned co-operation between the various units involved.