ΔE 30.9, loose: different enough that you should pick on purpose. Biel-Tan Green is noticeably lighter, much more saturated, cooler than Military Shade.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 31). Biel-Tan Green is noticeably lighter, much more saturated, cooler than Military Shade.
The same difference applies the other way round: Military Shade is noticeably darker, much more muted, warmer.
ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See Military Shade on the colour wheel See Biel-Tan Green on the colour wheel
All matches: Military Shade equivalents · Biel-Tan Green equivalents