Final answer:
The question does not provide enough information about the awarding of the Purple Heart; instead, it mentions other honors like the Medal of Honor and Croix de Guerre. Without explicit information, we cannot ascertain who was awarded the Purple Heart for their last assignment.
Step-by-step explanation:
The Purple Heart is a United States military decoration awarded to soldiers who are wounded or killed while serving. None of the descriptions provided directly indicate which soldier was awarded the Purple Heart for their last assignment. We do know, from historical context, that the Medal of Honor and other commendations such as the Croix de Guerre and Presidential citations were awarded to individuals for acts of heroism or meritorious service. For example, Private Henry Johnson was posthumously awarded the Medal of Honor, and United States Marine Eugene Obregon received the Medal of Honor posthumously for using his body to shield his comrades. However, these honors are separate from the Purple Heart and there is no direct mention of the Purple Heart being awarded in the information provided.