A journalist writes a material as she watches a live telecast of the U.S. presidential election standing at portraits of U.S. presidential candidate Donald Trump and Russian President Vladimir Putin in the Union Jack pub in Moscow, Russia, Wednesday, Nov. 9, 2016. Russia’s lower house of parliament is applauding the election of Trump as U.S. president. (Photo: AP)

In the early 1980’s, while serving in the Israeli Defense Force (IDF), I was a fire control officer in a HAWK surface to air missile battery. Pretty soon after my basic and professional training the first Lebanese War, known as Operation Peace for Galilee broke out and my unit was deployed to the summit of Mount Barouk in Northeastern Lebanon. In this war, the IDF engaged various Palestinian militias as well as the Shia militias native to the Shia population of Southern Lebanon.

Our primary enemy, however, was Syria under the father of today’s Syrian dictator, Hafez Al-Assad. Our job was to shoot down the high-flying Syrian MiG-25 that was engaged in aerial photography of Israeli positions. As was since made publicly known, we had succeeded in that mission.

Thirty-five years later, the Syrian theater is entering a phase of extreme escalation especially as far as its airspace is concerned. It is important to realize that Syria is a small country by North American standards; it’s about the size of Washington State. In this limited airspace, four major air forces are operating twenty four hours a day: the Syrians, the Russians, the Americans, and the Israelis.

In addition to flying objects, both manned and unmanned, many of which are equipped with powerful radar systems with operational ranges in the hundreds of miles, all the aforementioned parties maintain surface based (in the case of the U.S., ship-based) surface to air (SA) missile systems that are operated at the highest levels of readiness. This means that the electromagnetic (EM) spectrum over Syria is full to bursting with every possible kind of radiation.

SA systems contain two types of radar: acquisition and illumination. Acquisition radar is designed to “acquire”, meaning “find” or “discover” all flying objects that can be classified as threats. Its energy is thus diffused through a vast volume of airspace. Illumination radar produces a very narrow beam (usually less than one degree of conical arc) that is directed at a particular flying object, bathing it in powerful EM radiation.

The only reason for illuminating a flying object in this manner is the collection of high-precision data on its trajectory, such as speed, direction of flight, and other items that are beyond the scope of this article. The collection, in real time, of this data enables the illuminating radar to “lock on” to the flying target and follow it, even in the face of extreme maneuvering by the pilot. The only objective of illuminating a target is the ability to immediately launch on it with the goal of shooting it down.

All modern military aircraft are equipped with sensors that detect when the aircraft has been illuminated. The indications to the pilots are not subtle and include audio, visual, and in some cases even tactile (a woodpecker-like solenoid repeatedly hitting the pilot’s shin) indicators. For a military pilot, having been illuminated by enemy radar means that your life is in immediate danger and a number of steps, both defensive and offensive are immediately warranted.

These steps include extreme maneuvering, flying into a gorge in order to break the line of sight between your aircraft and the illuminating radar, engaging electronic warfare systems that are designed to jam and misdirect that illuminating radar, and finally launching air to surface (AS) missiles that are designed to lock on to the illumination beam and ride it down to the illuminating radar with the purpose of destroying it. Clearly, the mission with which the aircraft has been tasked, cannot continue until illumination by hostile forces is neutralized.

The threat to US aircraft operating in the theater are not insignificant.

David Avniel, editor-in-chief of Tsionizm.com and former USAF F-15 pilot and combat veteran of Desert Storm, who also flew for the Israeli Air Force when asked to assess the tactical impact of the Russian threat: “Close ground support A-10 Warthogs are very vulnerable. USAF aircraft, depending on where the Russian S300 SA batteries are deployed are at great risk. This threat could force the use of stealth-capable F-35 and F-22 exclusively, at least in some areas. I would not be shocked to see the loss of 4th generation air frames like F/A-18, F-16 and F-15 along with A-10.”

Russia has now officially put the U.S.–and in fact the rest of the world–on notice. Any aircraft, manned or unmanned, found in the Syrian airspace east of the Euphrates river on the border with Iraq, that does not belong to either the Syrian or the Russian air forces will be classified as a hostile target and illuminated by the Russian SA systems.

The implications of this step, if in fact the reporting on it by the Russian media is accurate, amount to a declaration of war. What this means in practice, is that Russia has just declared all of Syria to be a no-fly zone for U.S., Coalition, and Israeli aircraft. This turn of events cannot be sustained neither by the US, nor by Israel. Both must fly over Syria in order to protect their vital security interests and defend their ground forces, both in Syria proper, in the Eastern Mediterranean, and in Northern Israel.

In the aforementioned First Lebanese War, Israeli Air Force destroyed, sustaining no casualties, all of the Russian made and operated SA systems in Syria, guaranteeing itself unfettered air superiority for the duration of the conflict and beyond. It is conceivable, in fact unavoidable, that the U.S. Air Force will have to take similar action in the coming days. The implications of direct engagement of Russian (as opposed to Syrian) SA installations by U.S. forces are easy to understand.

A game of chicken is playing out before our eyes. First, Trump, following up on a campaign promise, yielded tactical authority to the Pentagon. The Pentagon, under Secretary Mattis, began using the U.S. Air Force for effect rather than for show as was done under the previous administration, leading to the shoot down yesterday, by an American F-18 of a Russian built, Syrian operated Su-22. This was a direct challenge to Putin’s red line in Syria as he had very clearly articulated to Oliver Stone in a recent interview: Russia would never permit Bashar Al-Assad to suffer the fate of Saddam Hussein or Muammar Kaddafi. The shoot down of the Sukhoi was a clear message by the Americans: let’s see you stop us. It now appears that Putin has raised the stakes.

At the time of writing it appears that the Pentagon is signaling its willingness to deescalate, reaffirming that the American led anti-ISIS coalition will substantially limit its activities to northwest Syria, west of the Euphrates. An occasional radar lock on a US airplane flying close to that line should not be of too much concern, but a time will arise when US interests will require operating against Assad’s air force in the heart of Syria. At that time Mr. Trump’s leadership will be severely tested.