Final answer:
After the Great Emu War resumed in mid-November, the emus resorted to guerrilla tactics, which made military efforts largely ineffective.
Step-by-step explanation:
During the Great Emu War, the event that happened immediately after the conflict resumed in mid-November was emus resorted to guerrilla tactics. After the military efforts resumed on November 12, the emus began using hit-and-run tactics in the wheat fields, which hindered the military's ability to control their population effectively.
This unconventional warfare by the emus led to the ultimate withdrawal of the military and the Australian government's refusal to reengage in 1934, 1943, and 1948, despite farmers' requests for aid.