<?xml version="1.0" encoding="UTF-8"?>
<item xmlns="http://omeka.org/schemas/omeka-xml/v5" itemId="200281" public="1" featured="0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://omeka.org/schemas/omeka-xml/v5 http://omeka.org/schemas/omeka-xml/v5/omeka-xml-5-0.xsd" uri="https://declassified.library.utoronto.ca/items/show/200281?output=omeka-xml" accessDate="2026-04-19T04:58:21-04:00">
  <fileContainer>
    <file fileId="183979">
      <src>https://declassified.library.utoronto.ca/files/original/c3dd576b6725a077ea74b1b692b9d6fc.pdf</src>
      <authentication>59b4bff3af5ebc1d319ea4806f35ec66</authentication>
      <elementSetContainer>
        <elementSet elementSetId="31">
          <name>PDF Text</name>
          <description/>
          <elementContainer>
            <element elementId="131">
              <name>Text</name>
              <description/>
              <elementTextContainer>
                <elementText elementTextId="1897528">
                  <text>Document disclosed under the Access to InformaiionAct^B
Document divulgue en vertu de la Loi surl’acces a LinformationX

ee

Ext. 180 a

*

OTTAWA FILE

28

M45.2.4/.5...65.
________ 50

Despatch No

SECURITY

Date... 3rd. October .1952

CLASSIFICATION

SECRET

FROM: THE PERMANENT REPRESENTATIVE OF CANADA TO THE NORTH ATLANTIC COUNCIL
AND OEEC., PARIS.
TO:
THE SECRETARY OF STATE FOR EXTERNAL AFFAIRS, CANADA

3
4

ference

feotl

ject:. Exercise ."MAINRRACE" Critique; Visit .to. .Oslo, by the NATQ .Council,
26-28 September.

deias

10,—=—i

10 OCT 1952

Copies Referred
To......................

On September the 26th members of the Council visited
1.
Oslo to attend the "critique" of exercise MAINBRACE. As each
delegation was offered two spaces in the aircraft provided by SHAPE
for this purpose, I thought it appropriate that Group Captain Newsome
should go along with me, and this he did.
2.
We found the programme (a copy of which is attached) both
interesting and, I think, profitable. Certainly it served to give the
Council a better grasp of the practical military problems confronting
our commanders. The fact that the critique itself was given in Oslo
harbor aboard HMS Eagle, the latest and most modern British carrier,
and in the presence of King Haakon and Crown Prince Olaf or Norway,
added a good deal of interest and exphasized the importance of the
event for the two Scandanavian members of NATO.

3.

No.(,
of Enclosures

One

Post File

No... 6/22

As to the value of the exercise, Admiral Sir PatricBrind,
Commander-in-Chief Allied Forces Northern Europe, observed that no great
strategic lessons were learned. Mainbrace was intented principally to
test international cooperation and tactical coordination among NATO
Commanders and forces. In this view, Brind was supported by both SACLANT
and SACEUR and all agreed that; in bringing to light certain weaknesses
and deficiencies - none of which appeared insurmountable, the exercise
was a success.
After a running "narrative" of the sequence of events
4.
given by an allied team, the main part of the critique took the form
of very short (4 or 5 minutes) talks by the twenty subordinate commanders who had participated in the exercise, (e.g., Senior Officer Minesweepers; Commander Coastal Forces; Commander Amphibious Group, etc.).
Each described briefly the phase of the operation for which he was
responsible, giving his appraisal of its effectiveness and its shortcomings, and suggestions as to how the latter might be overcome. These
comments with the narrative that preceded them and the remarks which
followed by Ridgway, McCormick and Brind, occupied us from 9 o’clock
until 12.30, when we rose for lunch.

For the most part, the expositions which we heard were
5.
carefully prepared and well presented. Because they were given on short
notice, immediately after the completion of the exercise, they

OSS
e)
****
LuLLoreo

llayln.
.814)
WOlork2
Mwntha • )9ob NMV
/

W %o

(

allle

Qaout
000222

/

1

�Document disclosed under the Access to Information
Document divulgue en vertu de la Loi surl’acces a /'information

•

$ 1
5
-v 7
. is—*

(

4

C O

G
2' 2

,

I

J
(3

(

D

C

.
C

s

j

"A

*

29
—
.* **

a

C

O

(

(
J

5

c 582

2.

C"

()

' 2

—

2

*

aran

O. &gt;

" 42

c

q*

W

C a
J

0

4/

(

(1

J

- C

ts

-2 —

*

*970*

33

t

y7

2.

C

(
U

()

G

?

-

£ ■
E '

(

(

21/

E P
)t :
tygsurtodl l

N‘

J

—
' 0

O

(5

(

&lt;

i 3

ts

(

.

.0

O

-

3

Y.

y&gt;

d

-

I

"t

JL'

*3

000223

�Document disclosed under the Access to Information Act
Document divulgue en vertu de la Loi sur l'acces a I’information

- 2 -

represented only a first analysis. In consequence, the effect
was perhaps less balanced and less clear cut than would otherwise have been the case. The final report is to be prepared only
after several weeks of careful and exhaustive study of the results.

Nevertheless, this preliminary appraisal was exceedingly
6.
interesting to all of us. It served to point up such weaknesses as
the lack of rapid, long-range communications facilities and the lack
of standardization in operating doctrine, procedures and techniques.
It raised important issues concerning the role of naval operations
in support of land forces and the use of maritime aircraft as antisubmarine weapons. It taught valuable lessons on the technique of
replenishing ships at sea. I have no doubt that the Canadian Naval
officers who were present will, in due course, be reporting to
National Defence in detail- on these and the many other problems
that were touched upon.
7.
You are no doubt aware that two Canadian vessels participated in Mainbrace - HMCS "Magnificient" and HMCS "Quebec". Unfortunitely,
neither of these ships was at Oslo. However, in conversation with'some of
senior commanders, I got the impression that Canadian personnel and
ships had given a good account of themselves during the exercise.
There were several references to the success of Quebec in her role as
raider.

While aboard the carrier, I had an opportunity to meet
8,
and talk briefly with the following Canadian officers: Captain
D.L. Dyer, RCN, Commanding Officer, and Lieutenant Porter, RCN, of
Magnificient; Commander F.C. Frewer, RCN, Director of Weapons and
Tactics, Naval Headquarters, Ottawa; Captain D.W. Piers, RCN, on
the Staff of SACLANT; Wing Commander B. Moffatt, RCAF, on the Staff
of SACLANT; and Major B.W. Blyth, School of Land/Air Wafare, Old Sarum.
Whatever the value of the exercise and the critique from
9
the military point of view, (and it seemed the consensus of the officers
I spoke to that it had been most useful) I am satisfied that the
political product of Mainbrace has been considerable. Not only has
it provided a spectacle of allied cooperation and unity but it has,
as well, been a concrete and not unimpressive demonstration on the
north east boundaries of the NATO area of the substance of our
professions with respect to mutual defence.
10
Furthermore, the attendance of members of the Council at
Mainbrace as at Holdfast was in my opinion a most useful experience
for all of us. It gave us some more real appreciation of the meaning
and possibilities of the Alliance over which we preside.

Q

.). V.s

Permanent Representative

000224

�</text>
                </elementText>
              </elementTextContainer>
            </element>
          </elementContainer>
        </elementSet>
      </elementSetContainer>
    </file>
  </fileContainer>
  <collection collectionId="196">
    <elementSetContainer>
      <elementSet elementSetId="1">
        <name>Dublin Core</name>
        <description>The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.</description>
        <elementContainer>
          <element elementId="50">
            <name>Title</name>
            <description>A name given to the resource</description>
            <elementTextContainer>
              <elementText elementTextId="1896607">
                <text>CDEX (NATO Exercises)</text>
              </elementText>
            </elementTextContainer>
          </element>
        </elementContainer>
      </elementSet>
    </elementSetContainer>
  </collection>
  <elementSetContainer>
    <elementSet elementSetId="1">
      <name>Dublin Core</name>
      <description>The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.</description>
      <elementContainer>
        <element elementId="43">
          <name>Identifier</name>
          <description>An unambiguous reference to the resource within a given context</description>
          <elementTextContainer>
            <elementText elementTextId="1897531">
              <text>CDEX00035</text>
            </elementText>
          </elementTextContainer>
        </element>
        <element elementId="48">
          <name>Source</name>
          <description>A related resource from which the described resource is derived</description>
          <elementTextContainer>
            <elementText elementTextId="1897534">
              <text>RG25, 50115-G-40, "North Atlantic Treaty Organization - Military, naval and air exercises," Part 1, Library and Archives Canada.</text>
            </elementText>
          </elementTextContainer>
        </element>
        <element elementId="47">
          <name>Rights</name>
          <description>Information about rights held in and over the resource</description>
          <elementTextContainer>
            <elementText elementTextId="1897537">
              <text>Canadian Crown</text>
            </elementText>
          </elementTextContainer>
        </element>
        <element elementId="49">
          <name>Subject</name>
          <description>The topic of the resource</description>
          <elementTextContainer>
            <elementText elementTextId="1897540">
              <text>Exercises</text>
            </elementText>
          </elementTextContainer>
        </element>
        <element elementId="45">
          <name>Publisher</name>
          <description>An entity responsible for making the resource available</description>
          <elementTextContainer>
            <elementText elementTextId="1897543">
              <text>Canada Declassified</text>
            </elementText>
          </elementTextContainer>
        </element>
        <element elementId="51">
          <name>Type</name>
          <description>The nature or genre of the resource</description>
          <elementTextContainer>
            <elementText elementTextId="1897546">
              <text>Text</text>
            </elementText>
          </elementTextContainer>
        </element>
        <element elementId="42">
          <name>Format</name>
          <description>The file format, physical medium, or dimensions of the resource</description>
          <elementTextContainer>
            <elementText elementTextId="1897549">
              <text>PDF</text>
            </elementText>
          </elementTextContainer>
        </element>
        <element elementId="44">
          <name>Language</name>
          <description>A language of the resource</description>
          <elementTextContainer>
            <elementText elementTextId="1897552">
              <text>en</text>
            </elementText>
          </elementTextContainer>
        </element>
      </elementContainer>
    </elementSet>
  </elementSetContainer>
</item>
