This exploratory study examined the influence of personal and psycholinguistic factors on tactical planning performance in a convenience sample of Australian Army personnel. Sixty male junior officers undertaking a tactical training course completed self-report measures of decision-making style, problem-solving appraisal, personality, and tactical planning expertise. A measure of general cognitive ability was sourced from participants' military records. During the course, officers completed several tactical planning exercises that were assessed by course instructors, and an overall measure of tactical planning performance was derived. Psycholinguistic data was derived from participants' thought processes elicited during an analogous planning exercise using a written think-aloud protocol. Automatic linear modeling analyses identified the combination of greater expertise and intuitive decision-making style, less spontaneous decision-making style and problem-solving confidence, younger age, and greater use of words relating to risk and past-focused concepts in their thought records, as significant predictors of better tactical planning, accounting for 55% of the variance in performance. Additionally, general cognitive ability, conscientiousness, and rational decision-making style shared moderate positive bivariate correlations with planning performance. This research has identified individual factors that contribute to tactical mission planning, along with future research avenues, which may inform the training of military commanders at the tactical level.