The zombie apocalypse would be a serious threat

Panic and ChaosIn the event of such an attack the U.S. would be completely thrown in a world war mode. The full force of the U.S. would be felt by hordes of mindless bags of rotting flesh. This is the same nation that was able to destroy the empire of Japan and undermined the armies of North Korea and Iraq. All the while we were halfway across the world. [1]This time our enemies our slow. Our enemies cannot use weapons. They are terrified of fire. They have to BITE to kill.As long as soldiers are constantly equipped, which won't be hard to do when they take control of industry, factories, airfields, etc, this will be the most hilariously fought conflict in U.S. history.I acknowledge that the dead will rise everywhere simultaneously. This is irrelevant since1. Many towns don't have cemetaries to begin with making it impossible for the dead to rise in such areas seeing as there arent any dead people2. Most if not nearly all cemetaries bury the dead in wooden coffins 6 feet below the ground. A zombie laying down will have to claw through a wooden coffin, then claw through 6 feet of dirt, then stand up, to begin to mobilize.So all in all many towns don't have cemetaries, and ones that do have the habit of burying the dead far beneath the ground. When zombies begin to appear, and pass near cemetaries, the undead bellow will have one hell of a time getting out. It would take weeks, possibly months assuming that the undead bellow are working constantly to claw out, and even then they cannot heal themselves from sratches, cuts, etc and over time the continuous wounds typically generated from digging through 6 feet of wood and dirt with your bare hands will severly physcially incapacitate the undead.The only real way a zombie attack can grow rapidly is if they attack an area that has numerous dead bodies merely lying around already rotting in the weather. Otherwise, reanimated bodies buried in cemetaries are going to take a while to mobilize and even then become severely incapacitated..The zombies in the first wave would be shot, burned, whatever and the dead bodies they passed over in cemetaries would begin to make movements and noise which would be easily detectable and then destroyed as well.Not So Easy to KillYes any military stronghold will be able to withstand zombies and be perfectly safe. Prison like walls with fire will be able to repel zombies from attacking those within. [2]The strongholds can be based off of the locations of airfields, farmland, industrial centers, etc keeping the defenders well supplied. Militaries wouldn't need to secure entire cities. They could secure small towns, villages, or make bases and HQ's near places of industry, transportation, agriculture, etc. Evacuating and saving everyone is a far fetched goal regardless of threat. Cities that do fall can be eradicated of the undead when the military and the civilian population set up fortifications and strongholds near vital supply and production areas.You are making a HUGE assumption by saying "finate" in terms of humans. In a military protected stronghold with living quarters and actively keeping zombies away, why wouldn't the human population continue to reproduce?Regarding your numbers.1. It would be daunting for the military to face of against 300 million, intelligent, well armed, and somewhat organized human combatants. This is not the same case. Additionally along with 3 million service members we have 30,000 tanks, APCs, Trucks, etc that can easily lay waste to zombies.[3]2. Civilian populations will be protected and safeguarded within the strongholds immediately, not all 300,000,000 will fall to zombies.In addition while a shot to the head may be the most common way of killing a zombie, simply blowing off their legs, running them over with tanks, setting them alight with napalm, white phosphorus, etc are all effective ways the military can get in on the zombie slaying.Self Spreading Epidemic.I do understand that the dead begin to rise simultaneouslyBut as I said above you are making the assumptions that 1. All cities, towns, counties, villages, etc all have cemetaries or dead people within the area.2. That the populated areas that do have the dead will be quick to mobilize when in fact the dead are buried in wood, sometimes metal coffins 6 feet below the surface of the Earth. When they attempt to rise they will be making a lot of noise, they will be taking a long time for us to detect them and they will be wounded in the ways anyone will be when crawling through tens of cubic feet of dirt and wood with their bare hands.3. That all dead people have brains that havn't been damaged or rotted away. Never SafeCompounds guarded by military forces and have fires burning around their premise keeping zombies away cannot have the dead randomly rise within. If this notion were true then all it would take just one zombie roaming out randomly in the Sahara desert to have the dead in Texas, Brazil, Nigeria, Taiwan, etc all over the world rise.Conclusion.I already acknowledged that the dead would rise simultaneously. But this is irrelevant since not all populated areas have cemetaries or dead people just lying about, cemetaries bury the dead in wooden coffins 6 feet below the ground, a strong barrier to zombies that rise and easy to detect when they attempt to claw out for weeks and months on end. The military is fighting slow, stupid, bags of rotting flesh that can be shot and set alight by the various incidiary weapons in their possesion as well as effective anti-personel rounds and if need be nuclear weapons as well[Refer to videos]http://www.youtube.com...http://www.youtube.com...http://www.youtube.com...With the military obviously being capable of overpowering the undead, anti-zombie fortresses can be erected and defended as well as centers of agriculture. After the initial wave of the dead simply rising, and assuming they get by detection when we hear them crawling up through the ground, which they won't, we can set up bases around areas of transportation, agriculture, industry, etc to keep ourselves supplied while at the same time keeping the dead within from becoming reanimated.There is no reason to assume that the human race would not keep reproducing meaning we aren't necessarily finite.[1] http://en.wikipedia.org...(Enemies the U.S had to fight. All are more threatening than walking bags of rotting flesh who bite)[2] http://en.wikipedia.org...(70 Years ago the UK was able to create flame traps creating walls of flame. This can be mimiced today)[3] http://www.globalfirepower.com...(U.S. Military Strength)