指挥若定 [- - ruò dìnɡ]be perfectly calm and collected in commanding the army; direct a battle steadily; direct (work, etc.) with perfect ease; give competent leadership:
•¶ 他手握数百万重兵, 指挥若定, 迫使敌人按他的步子走。 He had everything under perfect control in commanding millions of troops and compelled the enemy to move according to his will.