3 ms·

Guerilla warfare is older than conventional warfare.

• jdkfglkjh34 5y ago
  I used the present tense.
  • ghusbands 5y ago
    You also said "modern". If guerilla warfare predates modern times, it can't be caused by something in them.
    • Zababa 5y ago
      If you add "being effective" to "guerilla warfare" it works, I think that's what was meant.
    • Talanes 5y ago
      "Cause" doesn't necessarily mean originate. They could have meant it in the same way that one could say "leaving food out will cause you to get ants."