Stability, Security, Transition, and Reconstruction operations often involve establishing rapport and discerning intent in close proximity with host nationals. Counterinsurgency operations can involve imminent danger situations such as guard duty, manning traffic control points, foot patrols, or apprehending insurgents. In prior work, Soldiers reported that correct interpretation of nonverbal behavior (NVB) allowed them to build rapport faster even without an interpreter. Soldiers also reported that misinterpretation or non-interpretation of NVB can often lead to deadly results. In several cases, Soldiers have recounted how specific incidents would have lead to the death of military personnel or host nationals if specific cues had been ignored. Some Soldiers reported that almost five months were needed before they acquired effective nonverbal skills in cross-cultural settings. This paper discusses the U.S. Army Research Institute's and eCrossCulture's assessment of a curriculum for interpreting NVB. The methodology features randomly assigned control and experimental subjects and pre and post-tests. Assessment results show statistically significant improvement in the acquisition of knowledge and skills with only 30 minutes of training. Four of five knowledge assessments show statistically significant improvements from 8.65% to 32.50%. Two of five skills assessments show statistically significant improvements from 9.94% to 35.55%. These improvements demonstrate that training for interpreting NVB is effective, even with short duration interventions. The benefits may include establishing better rapport and trust with host nationals and reduced risk to military members.