T The purpose of this study was to analyze the influence of Transformational Leadership, Strategic Planning and Organizational Culture on Organizational Performance mediated by Organizational Commitment at the Indonesian Navy\\\'s Education and Training Doctrine Development Command.This research uses the method of testing the hypothesis (hypothesis testing). employs 350 samples, a sample that fulfills the requirements of 323 respondents. The results showed that all hypotheses were accepted, the increase in Organizational Performance was more influenced by Organizational Culture. Transformational Leadership has a positive and significant influence on Organizational Commitment that is greater than Strategic Planning and Organizational Culture. The role of Organizational Commitment as a mediating variable further strengthens the effect of Organizational Culture on Organizational Performance.Thus, decision making in improving Organizational Performance in Kodiklatal can be carried out through the Organizational Culture approach as an alternative which is supported by Transformational Leadership which has a major influence on Organizational Commitment. The implications of this research encourage managerial decision makers in the Indonesian Navy and Kodiklatal to optimize organizational performance. The novelty of this research is the use of Organizational Culture, Leadership Transformation and Strategic Planning simultaneously, which has not been carried out by previous research, especially research on the Indonesian Navy\\\'s Doctrine Development, Education and Training Command.Keywords: Transformational Leadership, Strategic Planning, Organizational Culture, Organizational Commitment and Organizational Performance