During the four years of the First World War, intelligence gathering from informants, captured soldiers, aerial reconnaissance and signals traffic developed in sophistication. In addition, the methods used to keep secrets secure kept up as an intelligence 'arms race' changed the nature of information gathering and warfare.
Become a member at https://plus.acast.com/s/explaininghistory.
Hosted on Acast. See acast.com/privacy for more information.
Activity