Earnings of God's Punishment

In 2020 AD, unknown creatures "DI" invaded the earth. Humanity is facing an unprecedented crisis. Countries around the world have joined forces to protect their common home - the earth. What means will countries use to protect their territories? If. In such an adverse situation, a country has no foreign aid from other countries and is even restricted in its means of survival. Even under such adversity, other countries have robbed us of our energy. Can such a country that is besieged from both sides resist alien invasion? Can it withstand the oppression of other countries? If so, how. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.