First thig You must do is to Do the firsts Missions
Then You Need To build your economy.Before you build Troops You Need 10 Refineries 100 Cities and 100 Metropolis or 300 Cites or 200 Metropolis
When You Build Those you be at least with 5000/10000 points.
Now you Will Need troops to protect your Economy,The Firsts Troops for Newbies is MG34 and Soldiers.After A while of Economy Improving You Must have in the end of two months at least 100 refinaries 1200 metropolis 1000/2000 cities/Factories.
Oh And also 1000 ammo Factories
AND Your Troops Must be:
1.000.000
500.000
1.000.000
500.000
600.000
200.000
600.000
1.000
140.000
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In The End of The Firsts Months {10 Months}You will be with 1.000.000/5.000.000