Protect the Volcano to ensure that it performs its mission. A dead Volcano means no critical minefield. As illustrated in this vignette, the Volcano is a critical piece of the battle plan. Lack of security neutralized the Volcano. There was nothing to slow the enemy down so that direct and indirect fire could destroy them.
Proper timing is essential.
The minefield must be placed late enough so that it will still be operational when the enemy arrives, and early enough to avoid detection by scouts and be a total surprise to the enemy's main body. The best time to place the Volcano minefield is normally after reconnaissance elements have passed through the planned minefield site.