Classic Flash game back in the day.
How to impress your friends and enemies by beating this on 'Impossible':
Step 1) Let your enemy spawn several cavemen, then hit the Special. If you don't have 200, buy a rock slingshot for 100 pennies.
Step 2) Buy a chicken turret for 200 pennies. This turret constantly smacks a chicken to make it plop eggs (poor chicken). Add more chicken turrets to make a flock.
Step 3) Keep spawning clubmen, 15 pennies each. Time it right and you'll have a super clubman by your base.
Step 4) Watch out for mousquetaires. They're deadly.
Step 5) Laugh like a maniac while the enemy's advanced military struggles against your army of primitive cavemen. How do you like them eggs?!!
Step 6) Advance to military age and replace the chicken turret with a double turret. Sadly, the double turret shoots bullets instead of eggs.
Step 7) Advance to space age and replace military turrets with blue-egg-shooting ionrays, 100000 pennies each.
Step 8) Go grab a cup of coffee, feed your pet chicken or chase off some trespassers with a club. Come back later when you have accumulated 600000 or more.
Step 9) Spawn 4 or 5 super soldiers, 150000 pennies each. Sit back and watch with a sinister smile.
Step 9 Alternative) Don't spawn super soldiers and collect infinity pennies.
"Victory! Congratulations, you won the war and destroyed your ennemy [sic]."
"Play again?"