Anonymous ID: d715b3 Dec. 28, 2018, 2:57 p.m. No.4505142   🗄️.is 🔗kun   >>5223

>>4505078

The blue X with K is a way to show a building has been cleared. Most likely from initial invasion. the K is likely Kilo company who cleared the area. Unit SOP defines how things are marked, my unit for instance used to hang chemlights on the exterior of the building.