You just pointed out the symptom of this affair: IEDs are more numerous and effective these days because western forces in Afghanistan and Iraq are too bound to the sparse road network. The fact that they need roads for their heavy wheeled armored vehicles like the MRAPs & Strykers and only some few good roads that are available in these countries literally funnel the vehicles into easily mined and ambushed territory. 

Insurgents could safely guess which road a patrol will go through due to the lack of good roads able to take the weight of a heavy wheeled vehicle. Just bury an IED on a road near a significant village or town and you're bound to get some military patrol coming through there eventually.

To avoid the IEDs being detonated by regular traffic, insurgents have learned the absurdly simple method  of burying the detonator system at a certain depth where the only the heavier weight of an armored vehicle will detonate it and not lighter everyday vehicles.

why is it with such formidable power they still cant defense themsleve against the NK?

i kept on reading that SK will only be able to fight back with US help, and that also after NK steamroller it's way all the way till seoul first!

nk got prc, just like sk got usa

yes seoul is sacrificial lamb, too close to the border
analyst predicted the nk artillery barrage could be up to anywhere at half million rounds per hour

Russia has just deployed its most advanced spyplane to Syria

The Tu-214R is a Russian ISR (Intelligence Surveillance Reconnaissance) aircraft. In other words, a quite advanced spyplane. As we have already explained here in the past, it is a special mission aircraft equipped with all-weather radar systems and electro optical sensors that produce photo-like imagery of a large parts of the ground: these images are then used to identify and map the position of the enemy forces, even if these are camouflaged or hidden. The aircraft is known to carry sensor packages to perform ELINT (Electronic Intelligence) and SIGINT (Signal Intelligence) missions: the antennae of the Tu-214R can intercept the signals emitted by the enemy systems (radars,aircraft, radios, combat vehicles, mobile phones etc) so as it can build the EOB (Electronic Order of Battle) of the enemy forces: where the enemy forces are operating, what kind of equipment they are using and, by eavesdropping into their radio/phone communications, what they are doing and whatwill be their next move.The aircraft is built by KAPO (Kazan Aircraft Production Association) and flown from the company’s airfield in Kazan.On Feb. 15, the Tu-214R registered RA-64514, serial number 42305014, the second of the two examples of this kind of aircraft built under contract with Russia’s Ministry of Defense,flew fromKazan to Latakia airbase, Syria.

With its ADS-B transponder signals broadcast in the clear and detected by Flightradar24 collecting stations, the aircraft could be tracked as it followed the eastern corridor from Russia, to the Caspian Sea and then to Syria via the Iranian and Iraqi airspaces. It’s not clear whether the aircrafthas already been delivered to the Russian Air Force, even though it is quite weird that a developmental aircraft is deployed abroad (unless the reason is testing it at war in a real scenario…).While it was still under development, the same Tu-214R aircraft flew what appeared to be an operative mission on Jun. 18, 2015, when it flew from Kazan to Crimea and back, closely following the border between Russia and Ukraine, most probably testing some of its sensors against real targets. Previously, the aircraft was spotted flying near Crimea.

Interestingly, while over the Caspian Sea, approaching the Iranian airspace, the Tu-214R performed a couple of 360° turns at 33.000 feet (weird, while enroute): maybe it was working on the diplomatic clearence to enter Iran?

no matter what, it is still one of the strongest in the world.. without US's assistance, they can roll into europe n might even manage to take over it
donation 

Well, actually its relatively possible to detect stealth technology. Certain wavelength of radar waves, using different radar transmitter and receiver stations all can possibly detect stealth aircraft.

You can also look for disturbances the aircraft causes in the atmosphere rather than looking for the aircraft itself. You can potentially use a Schlieren telescope to detect the movement of atmospheric disturbances as a stealth aircraft moves through the atmosphere.


A photograph of a fighter jet's atmospheric disturbances taken from a Schlieren telescope

Basic radar computers and tech are also increasing in complexity and capability, so its entirely possible even basic modern radars can already detect older 1980's-level stealth technology.

Soviet and China style air forces are very big on ground radar-controlled fighter deployments. So they have the advantage of having a bigger picture than individual fighter squadrons acting on it alone without AWACS. So ground controller can potentially 'see' better and have a clearer view of the situation than its fighters the air and guide them to their targets accordingly.

History has shown many examples of 'obsolete' fighters taking on state-of-the-art fighters and shown at least parity with them, with the help of ground controllers.

Currently hardly any stealth fighter/bomber going to be first to attack.
It usually start with a massive ew and cruise missile spamming for sead ops.
But than again these strategy only work against smaller country.
How well it will perform against russian and china is a big question.

T-90SM with Relikt ERA is even better.....Perhaps what's in Syria is Russian-provided T-90A with Kontakt-5

Those Russian military advisors should really kick those Syrian forces' asses into attention. With some semblance of proper discipline and tactics, they could've had a much better situation than they are now in.