1 August 1955
Memorandum for: Deputy Director Plans/COP
Via: Chief Foreign Intelligence
From: Chief, Soviet Russia Division (SR)
Subject: REDSOX * Mission to Estonia with Support of DIS
1. The Baltic Branch (SR/2) of SR Division has plans for a REDSOX mission to Estonia in the spring of 1956. These plans call for the infiltration of two black agents into the Estonian SSR for the purpose of recruiting resident agents therein for carrying out clandestine operations.
2. The inception of these plans took place about one year ago. Coincidental with that time, SR/2 had successfully mounted a REDSOX infiltration mission into Northwest USSR by means of a personnel-carrying free balloon. That balloon was launched from a fishing vessel manned by Norwegian Intelligence Service personnel from a bay in the Barents Sea.
3. The proven capability of a small ship as a launching platform for personnel balloons suggested a similar type might be successfully employed in the Baltic Sea. The employment of a balloon as an infiltration vehicle was considered at the time to resolve to a great degree the problem of security connected with the vulnerability to detection of aircraft overflights of Soviet territory.
4. Since independent Agency maritime facilities were unavailable to us in the Baltic waters, it was decided to approach a friendly intelligence service that would provide such facilities for our use under natural conditions of cover. The Danish Intelligence Service (DIS) was such a service. For some time, SR/2 has been collaborating with the DIS, via the (redacted) and West European Division, for procurement of intelligence via personnel of Danish flag shipping.
5. In the spring of this year, SR/2 sent an SR Division balloon operations officer to (redacted) to discuss the feasibility of mounting personnel-carrying free balloon operations into the Baltic states of the USSR from a DIS-controlled boat west of the line 30 miles off the Baltic states' coastline. The results of this mission were positive. Our balloonist and the (redacted) reported that the DIS was genuinely interested in cooperating to the extent of their ability. Subsequent negotiations with the DIS suggested it would be willing and able to provide us with a requisite vessel and the necessary operational, logistic, and meteorological support for mounting the desired operation.
6. In order to stimulate an even greater enthusiasm on the part of the DIS in such undertakings, it was concluded to be in the best interests of the Agency to train two DIS officers in the techniques of balloon operations. Peripheral conversations on this matter suggested the DIS may be willing to assign two of their officers for such training. Prior to extending a firm invitation to the DIS, SR Division examined the possibility of training these officers both in the United States and in Denmark.
7. We would like to train the Danes in the United States. We envisage two advantages to this. First, the availability of proper facilities specially equipped to handle this training. And second, by providing hospitality to the D1S officers in the United States, we anticipate developing in then a sense of favorable obligation to the Agency. But should DIS find itself unable to spare Its officers for a sojourn here, we are prepared to carry out the training in Denmark.
8. On 13 July 1955, Chief FI, authorized us to proceed with the invitation; on receipt of this, we took immediate steps to assure us of the availability of facilities for such training in the near future. As soon as a favorable reply is received at this Division, we will go ahead and extend a formal invitation to the Danes.
9. The training course designed to qualify two Danish representatives as balloon launching officers will take approximately four weeks. Sometime after the conclusion of that course, it is anticipated that an SR balloon operations officer will proceed to Denmark to participate with the DIS in balloon launching trials from a DIS fishing vessel of the type planned for dispatch operations next spring.
10. It may also be found advisable, at some time prior to the REDSOX infiltration mission, to take the DIS boat to the operational waters in order that the operational personnel may become familiar with conditions in that area. And should it be consistent with policy at that time, we might take advantage of the vessel's presence there to launch propaganda leaflet-carrying balloons to the Baltic states. An ancillary PP mission of that type may serve to provide the participating personnel with a taste of clandestine operations, which would serve to make them a little more familiar with an operational atmosphere and instill in them a certain degree of confidence in carrying out hazardous missions.
In February 1956, CIA decided to discontinue the planned operation. One of the reasons was: “Information received late in 1955 through interrogation of a confessed Russian Intelligence Service (RIS) agent indicates that the pool of existing operational support assets in the Estonian SSR are either under RIS control, or RIS monitored, and planned contacts through these channels can no longer be considered operationally secure for the REDSOX agents.”
* REDSOX refers to "Operations involving the illegal return of defectors and emigres to USSR as agents."
Graphic taken from a USA Today newspaper article.




