Allied Troops Clean Up Ash From Mount Vesuvius

The transcript discusses the impact of a Soviet eruption on allied troops, noting that it has not disrupted supply lines. It also describes the Pacuvius outburst, highlighting the awe it inspires in those engaged in life-and-death struggles.

In what ways did the extra work of allied troops contribute to the overall effort during the crisis?

What does the phrase 'marks his biggest guns' imply about the situation at the front?