Scope upgrade:
     In  the  first  level  of  the Market Garden campaign, if you can
parachute  into  the  windmill,  you'll  not  only have a nice vantage
point, but you'll find a scope upgrade for the M1 Garand.

Thompson drum upgrade:
     In  the  first  level,  parachute  onto  the  red  flare near the
searchlight  on the left of the screen. Wax the solider there and pick
up a 50 round drum for the Thompson.