ΔE 14.1, fair: the same colour family, but not a straight swap. Military Yellow is a little darker, cooler than Sand Brown.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Military Yellow is a little darker, cooler than Sand Brown.
The same difference applies the other way round: Sand Brown is a little lighter, 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 Sand Brown on the colour wheel See Military Yellow on the colour wheel
All matches: Sand Brown equivalents · Military Yellow equivalents