1) After a failed base defense mission, soldiers that were currently wounded (so could not fight in the defense mission), or that were in transit being transferred to the base, are deleted from the save file rather than added to the memorial wall. Even the total "soldiers recruited" number is reduced like they never existed.
I think it would make more sense to consider these soldiers MIA and add them to the memorial rather than delete them from the save file. Potentially they were high ranking with many missions and kills. They deserve better than deletion.
2) Also, there is a "Lost in Service" screen after a successful base defense mission, but not a failed base defense mission. I think it would be nice to show the "Lost in Service" screen for both.