Meritorious Unit commendation:
Survive 1000 waves before the 25th misson(Effect:M1 garand for soldiers)
Mud and Blood Cross:
Survive 5000waves before the 50 mission
(Effect:All troops start with 9exp)
Victoria Cross:Survive 10000waves before the 100th mission & Less than 2500troops deployed
(Effect:Free airbrone drop)
Somewhat impossible and needs lots of luck
Assault/Defence expert award
Assault-Must have an average 50+ kills per mission after 10 missions
(Effect ---Enemy less courageous)
Defence-Must survive 50+ waves after 10 missions
(Effect---Every soldier +10morale)
Probably medium