War isn't all about firepower!
Sometimes...
Psychological warfare is also one of the most classic "reserved items".
During World War II, Germany spread beautifully printed Christmas cards behind the Allies' lines, featuring a lush Christmas tree. However, beneath the tree lay the body of a German soldier, with "Ladies, whose husband is this?" written in German. These cards were broadcast to the wives at home, sparking their worries about the safety of their husbands, and consequently leading to war-weariness.
There are more straightforward methods too.
For instance, many drug traffickers fabricated stories about Victor being blown up here and there, causing internal panic. But in today's world of increasingly developed communication, the practicality of such tricks is diminishing...
Someone like Victor would simply throw leaflets directly into "enemy" territory—blunt, direct, and crude...