[0] https://en.wikipedia.org/wiki/Grenade_(insignia)
[1] https://en.wikipedia.org/wiki/Carabinieri#/media/File%3AFiam...
[2] https://en.wikipedia.org/wiki/Grenadier_Guards#/media/File%3...
Traditional grenadine is purple, not red.
Modern rechargeable electricial markers that could last all night were not common at all.
Rows of bombs with a few inches of raw sooty flame coming from a wick where the fuse would be.
Drive your Model T or Edsel carefully between the lines of flickering fire.
Plus the Pink Panther cartoons had an associated subject line occasionally featuring a mad French terrorist bomber often carrying one of the round black bombs.
This was basically ridiculing the bombers that had been in the news terrorizing them.
Both were enjoyed by American kids as much as domestic cartoons, even though they were basically like silent movies, intentionally featuring no actual dialog, intended for international consumption without need for translation.
All the American villians had the same kind of bombs anyway.
Is this common where you drive? Where I drive in the US, it's all traffic cones with reflective parts, relying on cars to have their headlights on to see the temporary barriers.
And on streets well lit with streetlights drivers are still knocking them down like dominos.
That was extra dangerous job as early bombs were not reliable, and had a chance to explode too soon.
But throwing a ball of metal with blackpowder is much older.