Guerilla warfare is a form of irregular warfare that uses small groups of combatants to carry out surprise attacks and ambushes against a larger, conventional military force. This tactic is often employed by resistance movements and insurgent groups to exploit their knowledge of the local terrain, the element of surprise, and the support of the local population to disrupt enemy operations and weaken their resolve. Guerilla warfare is particularly significant in the context of resistance against European expansion, as it allows smaller, less-equipped forces to stand up against more powerful colonial armies.