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</style><table class="infobox" style="width:25.5em;border-spacing:2px;"><tbody><tr><th colspan="2" class="infobox-above" style="background-color:#C3D6EF;color:inherit;text-align:center;vertical-align:middle;font-size:110%;">Southern Defense Command</th></tr><tr><td colspan="2" class="infobox-image" style="text-align:center;border-bottom:1px solid #aaa;line-height:1.5em;"><div class="infobox-caption">Southern Defense Command WWII Era Patch</div></td></tr><tr><th scope="row" class="infobox-label" style="padding-right: 1em;">Active</th><td class="infobox-data">1941–1945</td></tr><tr><th scope="row" class="infobox-label" style="padding-right: 1em;">Country</th><td class="infobox-data">United States of America</td></tr><tr><th scope="row" class="infobox-label" style="padding-right: 1em;">Branch</th><td class="infobox-data"><a href="United_States_Army" title="United States Army">Army</a></td></tr><tr><th scope="row" class="infobox-label" style="padding-right: 1em;">Role</th><td class="infobox-data">Home Defense & Training</td></tr><tr><th scope="row" class="infobox-label" style="padding-right: 1em;">Garrison/HQ</th><td class="infobox-data"><a href="Fort_Sam_Houston" title="Fort Sam Houston">Fort Sam Houston</a>, <a href="Texas" title="Texas">Texas</a></td></tr><tr><th colspan="2" class="infobox-header" style="background-color:#C3D6EF;color:inherit;text-align:center;vertical-align:middle;font-size:110%;">Commanders</th></tr><tr><th scope="row" class="infobox-label" style="padding-right: 1em;">Commanding General</th><td class="infobox-data"><a href="Herbert_Brees" class="mw-redirect" title="Herbert Brees">Herbert Brees</a> (March 1941-May 1941)</td></tr><tr><th scope="row" class="infobox-label" style="padding-right: 1em;">Commanding General</th><td class="infobox-data"><a href="Walter_Krueger" title="Walter Krueger">Walter Krueger</a> (May 1941-Jan 1943)</td></tr><tr><th scope="row" class="infobox-label" style="padding-right: 1em;">Commanding General</th><td class="infobox-data"><a href="Courtney_H._Hodges" class="mw-redirect" title="Courtney H. Hodges">Courtney H. Hodges</a> (Jan 1943-Jan 1944)</td></tr><tr><th scope="row" class="infobox-label" style="padding-right: 1em;">Commanding General</th><td class="infobox-data"><a href="Henry_Conger_Pratt" title="Henry Conger Pratt">Henry C. Pratt</a> (Jan 1944-Jan 1945)</td></tr></tbody></table>
<p><b>Southern Defense Command</b> (<b>SDC</b>) was established on 17 March 1941 as the command formation of the <a href="U.S._Army" class="mw-redirect" title="U.S. Army">U.S. Army</a> responsible for coordinating the defense of the <a href="Gulf_of_Mexico" title="Gulf of Mexico">Gulf of Mexico</a> coastal region of the United States. A second major responsibility of SDC was the training of soldiers prior to their deployment overseas. The first Commanding General of SDC was <a href="Lieutenant_General" class="mw-redirect" title="Lieutenant General">Lieutenant General</a> <a href="Herbert_Brees" class="mw-redirect" title="Herbert Brees">Herbert Brees</a>, who simultaneously commanded the <a href="Third_United_States_Army" class="mw-redirect" title="Third United States Army">Third Army</a>. General Brees retired due to age in May 1941, and was replaced by Lieutenant General <a href="Walter_Krueger" title="Walter Krueger">Walter Krueger</a>, who held both posts until January 1943.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> SDC headquarters was co-located with the existing Third Army headquarters at <a href="Fort_Sam_Houston" title="Fort Sam Houston">Fort Sam Houston</a>. SDC's operational region covered the states of <a href="New_Mexico" title="New Mexico">New Mexico</a>, <a href="Texas" title="Texas">Texas</a>, <a href="Oklahoma" title="Oklahoma">Oklahoma</a>, <a href="Arkansas" title="Arkansas">Arkansas</a>, <a href="Louisiana" title="Louisiana">Louisiana</a>, <a href="Mississippi" title="Mississippi">Mississippi</a>, <a href="Alabama" title="Alabama">Alabama</a>, <a href="Tennessee" title="Tennessee">Tennessee</a>, and the western half of the <a href="Florida_Panhandle" class="mw-redirect" title="Florida Panhandle">Florida Panhandle</a>.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup>
</p><p>At least one <a href="Regimental_combat_team" title="Regimental combat team">regimental combat team</a>, a regiment detached from a division being "triangularized" (reducing from four infantry regiments to three), was available to the SDC for mobile defense from early 1942. This was the <a href="166th_Infantry_Regiment_(United_States)" title="166th Infantry Regiment (United States)">166th Infantry Regiment</a>. This lasted at least through September 1943.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup>
</p><p>Third U.S. Army was shipped to England in January 1944; once there Lieutenant General <a href="George_S._Patton%2C_Jr." class="mw-redirect" title="George S. Patton, Jr.">George S. Patton, Jr.</a> took over command from <a href="Courtney_Hodges" title="Courtney Hodges">General Hodges</a>. <a href="Major_General" class="mw-redirect" title="Major General">Major General</a> <a href="Henry_Conger_Pratt" title="Henry Conger Pratt">Henry C. Pratt</a> assumed command of Southern Defense Command.
</p><p>In January 1945 Southern Defense Command was merged into <a href="Eastern_Defense_Command" title="Eastern Defense Command">Eastern Defense Command</a>.<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup>
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<div class="mw-heading mw-heading2"><h2 id="Commanders">Commanders</h2></div>
<p>The following men served as Commanding General, Southern Defense Command:
</p>
<ul><li>Lieutenant General <a href="Herbert_Brees" class="mw-redirect" title="Herbert Brees">Herbert Brees</a>, 17 March 1941 – 15 May 1941</li>
<li>Lieutenant General <a href="Walter_Krueger" title="Walter Krueger">Walter Krueger</a>, 16 May 1941 – 2 February 1943</li>
<li>Lieutenant General <a href="Courtney_H._Hodges" class="mw-redirect" title="Courtney H. Hodges">Courtney H. Hodges</a>, 2 February 1943 – December 1943</li>
<li>Major General <a href="Henry_Conger_Pratt" title="Henry Conger Pratt">Henry Conger Pratt</a>, January 1944 – October 1944</li></ul>
<div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2></div>
<ul><li><a href="Western_Defense_Command" title="Western Defense Command">Western Defense Command</a></li>
<li><a href="Central_Defense_Command" title="Central Defense Command">Central Defense Command</a></li>
<li><a href="Eastern_Defense_Command" title="Eastern Defense Command">Eastern Defense Command</a></li>
<li><a href="Alaska_Defense_Command" title="Alaska Defense Command">Alaska Defense Command</a></li>
<li><a href="Antiaircraft_Command_(United_States)" title="Antiaircraft Command (United States)">Antiaircraft Command (United States)</a></li>
<li><a href="Caribbean_Defense_Command" class="mw-redirect" title="Caribbean Defense Command">Caribbean Defense Command</a></li></ul>
<div class="mw-heading mw-heading2"><h2 id="Further_reading">Further reading</h2></div>
<ul><li><style data-mw-deduplicate="TemplateStyles:r1238218222">
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</style><cite id="CITEREFConnEngelmanFairchild2000" class="citation book cs1">Conn, Stetson; Engelman, Rose C.; Fairchild, Byron (2000) [1964]. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20071225041653/http://www.history.army.mil/books/wwii/Guard-US/index.htm#contents"><i>Guarding the United States and its Outposts</i></a>. United States Army in World War II. Washington, D.C.: Center of Military History, United States Army. Archived from <a rel="nofollow" class="external text" href="http://www.history.army.mil/books/wwii/Guard-US/index.htm#contents">the original</a> on 25 December 2007<span class="reference-accessdate">. Retrieved <span class="nowrap">31 January</span> 2017</span>.</cite></li>
<li><cite id="CITEREFKrueger1953" class="citation book cs1">Krueger, Walter (1953). <i>From Down Under to Nippon: The Story of the 6th Army in World War II</i>. <a href="Lawrence%2C_Kansas" title="Lawrence, Kansas">Lawrence, Kansas</a>: Zenger Pub. <a href="ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <bdi>0-89201-046-0</bdi>.</cite> <span class="cs1-hidden-error citation-comment"><code class="cs1-code">{{cite book}}</code>: </span><span class="cs1-hidden-error citation-comment">ISBN / Date incompatibility (help)</span></li>
<li><cite id="CITEREFStanton1991" class="citation book cs1">Stanton, Shelby L. (1991). <i>World War II Order of Battle</i>. Galahad Books. <a href="ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <bdi>0-88365-775-9</bdi>.</cite></li>
<li>Southern Defense Command from Patch King Catalogue at the <a rel="nofollow" class="external text" href="https://ia800301.us.archive.org/3/items/1941PatchKingPage001_201604/Page%20013.jpg">Internet Archive</a></li></ul>
<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>
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<li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text">Krueger, pp. 3–4</span>
</li>
<li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20080102011941/http://www.history.army.mil/books/wwii/Guard-US/maps/map1.htm">Map of Continental Defense Organization, from Conn</a></span>
</li>
<li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text">Conn, pp. 36–39</span>
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<li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text">Stanton, p. 230</span>
</li>
<li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text">Conn, p. 44</span>
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