Positioning

The good tactician will spell out his objectives clearly and will enforce strict military discipline in his army.

He must also be good in these five areas:
1. Measuring distances
2. Estimating costs
3. Analysing strengths
4. Calculating chances
5. Planning victories

Geography gives rise to measurement of distance.
Measurement gives rise to estimation of costs.
Estimation gives rise to analysis of strengths.
Analysis gives rise to calculation of chances.
Calculation gives rise to the plan for victories.