Comment by Asparagirl

Ancestry has a somewhat smaller copy of the BIRLS database online, covering just the years 1850-2010 [1], and it seems to have been published on their website in 2011: https://www.ancestry.com/search/collections/2441/

Our data set from the VA contains data through mid-2020, and was turned over to us in 2022 after undergoing extensive double-checking by the agency, including through non-public VA sources, to confirm the veterans really were all deceased. There's a paper showing the agency's methodology on our site, which we FOIAed from them.

There are a significant number of deceased veterans whose data is *not* included in the BIRLS database, because they (or their family/heirs) simply did not have any contact with the VA concerning benefits in or after the 1970s, which is when the database was first starting to be built. That is, their files almost always still exist on a warehouse shelf somewhere, but they weren't active any time in the past fifty years so they didn't get pulled and indexed into the database. You can still make a FOIA request to the agency asking for one of those files, but the VA will have a lower chance of successfully finding the file, and it usually will take longer for you to get a response.

[1] 1850 is very likely an approximation. While there are certainly deceased veterans listed in the BIRLS database who had birthdates or deathdates in the mid nineteenth century and/or service in the late nineteenth century, they are relatively few. Many of them are actually veterans with likely birthdates or deathdates in the twentieth century whose data seems to have been initially recorded by the VA with a two digit year of birth or death or enlistment/entry, and then assigned to the wrong two digit prefix, causing an incorrect four digit year of birth or death or year of entry/enlistment into service.

In other words, the VA's historic data is very messy and is a great example of an actual Y2K issue.