In this lesson, students will answer the following essential questions: How has the prevention and battling of health threats changed between the US-Mexican War and today? Background The 2-minute video segment "Medicine in the War" can be used to accompany this lesson plan. The video clip can be downloaded from our For Kids page . Students can work individually or in groups. Each individual or group can review one or all four health threats. Preparation Print one copy per student of each material listed. Find the 2-minute video segment "Medicine in the War" which can be used to accompany this Duration: 30 Minutes.