If I thought that getting historical background to Cordon Sanitaire defoliation efforts (see previous post) was challenging, I was wrong!

Trying to find anyone who has in-depth information on the electronic early warning systems installed on the fences was an even more daunting task. To be very honest I am not in any way convinced that what I have managed to find holds too much water and this is once again where I will be hoping that someone, somewhere reads this post, tells me I have written complete rubbish and puts things right. I can take it and no offence will be taken I assure you. We simply need to get this as factual as we can. There has to be Rhodesian Army veterans that actually installed and monitored the electronic side of things that can help here.

The following redaction comes from more than one source, the reliability of which has not been confirmed to me. From an intelligence source and reliability perspective I therefore have no option but to rate it as F/6 (Insufficient information to evaluate reliability. May or may not be reliable/The validity of the information cannot be determined) and should therefore by no means be quoted as being the way things actually were. Read on………..

For the sake of simplicity we will consider the Cordon to be 25 metres wide, fenced on both sides, and containing anti-personnel blast mines.

On the home side a system of electronic sensors divided into monitored sectors and wired to sector control boxes formed the basis of the early warning system. I have not been able to find any information as to what type of sensors (movement, vibration, broken electrical circuit, audio, etc.) were used, nor who was responsible for installing them (possibly the Rhodesian Corps of Signals (8 Signal Squadron)).  According to one source these control boxes were placed in bunkers close to the home side fence and manned full-time by troops waiting for an alarm to be set off.

Logic makes me think that a combination of activation triggers may have been used. Apparently the idea was that any penetration of the Cordon would be detected by detonations or some form of electronic sensor. My information claims that reaction to these events was primarily by vehicle and took place within 10 minutes of a signal being received. In addition to the vehicular response, artillery fire was also used to put down fire on ranged, pre-selected targets. I imagine this would be from 25 pounder howitzers or possibly 120mm mortars.

It is my understanding that the only parts of Cordon Sanitaire to be fitted with an electronic early warning system were the Musengezi/Mukumbura, and Nyamapanda to Ruenya minefield. Soon after these areas were completed a significant amount of false alarms were being recorded. This resulted in finding no enemy presence at the alarm trigger point. Due to the significant cost of ammunition being expended on these false-positive events, it was decided to curtail the rapid response on these areas in 1975. An ongoing Cordon Sanitaire review shelved the whole idea of an early warning system shortly thereafter.

And so ended the Cordon Sanitaire early warning system.

I do not know how effective these measures were as I never encountered them during my time serving in the Rhodesian Corps of Engineers. Personally I do not think the electronic system was as successful as the planners initially thought it would be and with the Rhodesian economy heavily burdened by sanctions and an ever-increasing defence budget there was little chance of any project surviving unless it showed significant success indicators (body count, infiltration mitigation, etc.).

I located the following on the issafrica.org website.  They seem to confirm in some ways parts of the foregoing:

EWS 1EWS 2EWS 3

I will continue to seek further sources to help unravel this interesting and little known subject.

Please also have a look at my website dedicated to Rhodesian and South African Military Engineers.  Please join us on the forums by using the following link:

http://www.sasappers.net/forum/index.php

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© Mark Richard Craig and Fatfox9’s Blog, 2009-2014. Unauthorised use and/or duplication of this material without express and written permission from this blog’s author and/or owner is strictly prohibited.

Getting to Mukumbura was a pain in the arse……literally. If you have had the opportunity to sit on the steel benches in the back of a Bedford RL for 400 clicks you will understand exactly what I mean. Your arse goes numb and so does your scrotum for some reason. I have even had pins and needles in my dick during these trips, loosing all sensation and not knowing if it was still an appendage to my body. Here is a picture of a Bedford RL:

Bedford RL

Bedford RL

Secondly, and more irritating than numb-nuts was the fact we had to deploy through Salisbury. This involved having to accept the hospitality of either 2 or 3 Engineer Squadron (Rhodesian Corps of Engineers). These units were based at either King George the Sixth Barracks (KGVI), or Cranborne Barracks (also home of the Rhodesian Light Infantry (RLI)). It seemed to many of us from 1 Engineer Squadron (Brady Barracks, Bulawayo), that the Salisbury Squadrons had an air of superiority about them. This was probably a result of Engineer Directorate also being in Salisbury. I cannot say that I enjoyed any of my visits to these units and the sooner we had done what we had to do there and got on our way the better. Having said all of that there were some good men in the Salisbury Squadrons and I made a number of close friends from these units during my 7 years in the Rhodesian Army. Here is a picture of the entrance to Cranborne Barracks:

cranborne Barracksfront gate

Our normal stop over was about 2 or three days and during this time we would do retraining, load up any logistics that needed to get to Mukumbura (including anti-personnel mines), and get pissed in the many watering holes in Salisbury. One of these pubs was La Coq D’or which the RLI considered to be their personal domain and woe betide any other Unit that encroached on their territory. There have been a number of memorable punch ups there. Here is a picture of the place (courtesy of New Rhodesian Website):

5385561975_99d656b981

And a menu cover from way back when:

Le Coq D'Or Ad 1953

All good things come to an end however and we had to move on. We had a mission after all…..to lay mines and stop the gooks getting into Rhodesia. We climbed up into the Bedford’s, and with the stench of exhaust fumes polluting the air and stinging our eyes we were off. Wrapped up against the cold in my prickly grey army issue blanket I could still taste the bacon, eggs and coffee we had for breakfast as I settled in for another ball-numbing journey.