Map-"Marker" mod-idea

[new_civilian]

Just a small idea when I saw the Landmark markers in SimCity: Why not add throwable/placable Map Markers as items 
Imagine a small sign/shield: CLEARED or just some different colored flare markers like the SWAT Teams use them...

[SIMON BAILIE]

Interesting, I can see possibilities for my playthroughs especially with the amount of smoke grenades I use cause usually every troop starts the mission with 4 primed smoke grenades and I have on occasion used about 80% of these on the big missions.