By 1943, much heavier armament than submachine guns was required. Jewish resistance forces would be paper tigers in the face of the Reich's overwhelming superiority in experience and firepower.
Katrina was an unfortunate consequence of the moribund well regulated militia in possession of a truly formidable arsenal.
Actually, I have to object.
To fight a tyrannical power takes will and determination, and disregard for your own life in order to benefit those of your countrymen. Self-interest is a human trait that is very useless and harmful in a freedom fighter.
When my Grand Uncle began to lead the 8th Route Army on ambushes against the Japanese, it was led on all fronts. The Chinese Communist Resistance established an "underground" system, where information was sent from fighters on the field to the leaders, and back to the fighters through a messenger network that involved everyone, resturaunt workers, shoe shiners, agents disguised as vagrants and beggars. Therefore, all Japanese activity within the city or town would be closely monitored.
Now, these ambushes were never carried out in a so called "military" fashion. To do so would be risking capture and death. Rather, each man, or small team, operated independently. There are no-holds bar, no such thing as civilized moves. It was to kill the enemy as fast as possible. Usually, a man dressed as a civilian would place himself amongst an area with high Japanese military activity. Once the time is right, he will start firing, every single shot, well placed and deadly accurate. Usually, before the confused enemy even start to wake up from the shock of the attack, many dead and dying already littered the ground. And in the midst of the confusion, the attacker escaped by using traditional tactics taught in ancient martial arts, distraction devices such as firecrackers and smokescreens.
The Chinese agents were also extremely thankful of the fact that the Japanese officers LOVED the whorehouses, especially in Shanghai. The agents would usually wait for the officers to get in the brothels. Once the enemy has been completely consumed in the sexual act, and obviously unaware of their surroundings, the Chinese agents hiding outside would simply go into the room, pull out their pistols, and blast the scumbags away. By 1943, over 600 high ranking enemy officers were assassinated in Shanghai. Elsewhere, vicious guerilla attacks left more Japanese troops dead than the 8th Route Army have killed in conventional battles. The pressure on the Japanese was constant. Once a team had infiltrated a Japanese camp and killed a certain amount of enemy soldiers in random, accurate fire, the Japanese would usually round up the surrounding villagers and bring them to a wide open place. At that moment, a single rifle shot would ring out, from many hundreds of yards away, and the Japanese commander would fall dead.
These attacks came so often that the Japanese command in China began to fear for their own lives. Even so, officers fell dead on a daily basis, to the point that Hideki Tojo decided, in 1943, that the Chinese insurgency was even more threatening than the American military action in the Pacific, and transferred the majority of his most skilled generals to China instead of to the Pacific islands.
Even children participated in the guerilla movement in northeast China. My Grand Uncle recounted of one instance where two starving young refugees came to the headquarters of the 8th Route Army. After he talked to them, he found out that they were actually brothers, ages 8 and 10, whose parents and entire family were massacred by the Japanese in Heilongjiang. For weeks, they lived a life of begging in the nearby towns, living off of what the good locals could provide, until they came upon a sleeping Japanese soldier in the Mukden railway station. The 10 year old boy cut the throat of the soldier with his dagger, then took his rifle and pistol. The two hopped the train to Mukden and killed over 20 more Japanese troops, shooting from rooftops and alleyways, before they fled onwards to the Communist camp.
These are only some of Grand-Uncle's experiences during the War.