Not sure he did. They could be bullet-marks, or dirt, or whatever, but they sure could be....On further examination I think what's on the blade might be blood......

Looks more like plain old gore to me .
See enhanced :

Yeah, blood and/or glop; possibly even mud from the ground; I can't decide how wet it looks; maybe some staring............I originally started examining the blade surface in hopes the lines were etched lamination; wouldn't that be interesting in an old photo?........

Ground looks fairly dry; them shoes are pretty clean. Maybe he did get his slice on.

think Tom's last comment explains it. what is interesting is the 1908 date for a very long blade, it has been suggested here that this blade is post WWII, clearly not.

To me this looks like a young boy mabe this is why the blade looks so big?And what about the burns to his face muzzle flash?

think the blade is at least 18"; he has a couple of bullet holes above his right eye, his eyes were likely covered with blood & they wiped them to take the pic. looks like a young adult

I dunno, at least the way Ive used blade length in my own estimation of ages, has been as a part in many other factors. Eg. long blade, aluminum fittings, center ridge scabbard, full rattan wrap, triangular crest, etc... then maybe post WWII. Larger blades definitely seem to have become more common over time (even just studying pieces made post 1900 we can see this), but of course that doesnt mean large blades did not exist in the past.

looks like this fellow had a full ratten wraped scabbard

It does look like a full length rattan skin wrap.