General Strategy
Resources should be invested in creating new resources or reducing expenses.
Rushing an enemy is the destruction of another group before they can set up any defense.
Defeat in Detail, destroy an enemy with overwhelming number of forces in smaller groups before they can come together. Use a few units to slow down an enemy army, and use the majority of forces to destroy the other one. Ambushes are another form of defeat in detail.
Eagle, get advanced units for an advantage. While developing advanced units there are not weaker units to defended against a rush.
Creeping Bombard, Artillery and sensor creep to shell the enemy from a distance.
Central Strategy, being in the center of battle means that supply lines have shorter distance to travel; the use forces can be used on parts of a surrounding enemy and destroy them before help can be sent. Lines of forces are easily sliced attackers.
Retreat, retreat leaving no resources to a smaller stronger position can reduce the effectiveness of concentrated attacks.
Expansion, expand to take all available resources.