The firm responsible for archiving the First World War soldiers' wills that are going online said they reveal some "quite interesting" emotions.
Iron Mountain commercial director John Apthorpe said:
With 230,000 individuals who died in the war, the emotions [that come through] are quite interesting when you read some of the notes they left.
A lot have straightforward statements, but some of them do have personal letters and touches, and a bit more detail about what's happening.
The wills, classed as official records, were only previously accessible through direct requests.
More top news
The family of the police officer who was murdered in the Westminster attack have thanked those who were with him 'in his last moments'.
Thousands of fans gathered for a public memorial honoring famous mother and daughter who died just a day apart.
More sunshine this Sunday