In Spot We Trust Event

Quemapueblos: Does Scout Down! require the light to be tier 4 or the tank destroying it to be above tier 4?  Not all lights tier 4+ get scout MM, so a tier 3 light or tank could possibly kill a tier 4/5 light. Or did the mission designer not know how the game is designed? The player achieving the mission and destroying the light tanks needs to at least tier IV or higher