Eastern Theater Of Operations
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The Eastern Defense Command was first established as the Northeast Defense Command on 17 March 1941 as one of four
U.S. Army The United States Army (USA) is the primary land service branch of the United States Department of Defense. It is designated as the Army of the United States in the United States Constitution.Article II, section 2, clause 1 of the United Stat ...
continental defense commands to plan and prepare for and execute defense against enemy attack in the months before America's entry into World War II. Its mission was defined as: "a territorial agency with appropriate staff designed to coordinate or prepare to initiate the execution of all plans for the employment of Army Forces and installations against enemy action in that portion of the United States lying within the command boundaries." This organization was charged with coordinating the defense of the Atlantic Coast, replacing the New England Defense Sector, an organization of the
U.S. First Army First Army is the largest OC/T organization in the U.S. Army, comprising two divisions, ten brigades, and more than 7,500 Soldiers. Its mission is to partner with the U.S. Army National Guard and U.S. Army Reserve to enable leaders and deli ...
. However, this did not initially occur, and the command was little more than a planning agency until 24 December 1941. Following the U.S. entry into World War II on 8 December 1941, the functions of the Northeast Defense Command were placed in a larger operational command, the Eastern Theater of Operations (following the example of the
Western Theater of Operations Western Defense Command (WDC) was established on 17 March 1941 as the command formation of the United States Army responsible for coordinating the defense of the Pacific Coast region of the United States during World War II. A second major respo ...
established on the west coast) on 24 December, but the command was renamed the Eastern Defense Command on 20 March 1942.Conn, p. 29, 33–39 After 24 December, the command exercised control over Army coast defense,
antiaircraft Anti-aircraft warfare (AAW) is the counter to aerial warfare and includes "all measures designed to nullify or reduce the effectiveness of hostile air action".AAP-6 It encompasses surface-based, subsurface ( submarine-launched), and air-ba ...
, and fighter assets from Maine through Florida. This specifically included the states of
Maine Maine ( ) is a U.S. state, state in the New England region of the United States, and the northeasternmost state in the Contiguous United States. It borders New Hampshire to the west, the Gulf of Maine to the southeast, and the Provinces and ...
,
New Hampshire New Hampshire ( ) is a U.S. state, state in the New England region of the Northeastern United States. It borders Massachusetts to the south, Vermont to the west, Maine and the Gulf of Maine to the east, and the Canadian province of Quebec t ...
,
Vermont Vermont () is a U.S. state, state in the New England region of the Northeastern United States. It borders Massachusetts to the south, New Hampshire to the east, New York (state), New York to the west, and the Provinces and territories of Ca ...
,
Massachusetts Massachusetts ( ; ), officially the Commonwealth of Massachusetts, is a U.S. state, state in the New England region of the Northeastern United States. It borders the Atlantic Ocean and the Gulf of Maine to its east, Connecticut and Rhode ...
,
Rhode Island Rhode Island ( ) is a state in the New England region of the Northeastern United States. It borders Connecticut to its west; Massachusetts to its north and east; and the Atlantic Ocean to its south via Rhode Island Sound and Block Is ...
,
Connecticut Connecticut ( ) is a U.S. state, state in the New England region of the Northeastern United States. It borders Rhode Island to the east, Massachusetts to the north, New York (state), New York to the west, and Long Island Sound to the south. ...
,
New York New York most commonly refers to: * New York (state), a state in the northeastern United States * New York City, the most populous city in the United States, located in the state of New York New York may also refer to: Places United Kingdom * ...
,
New Jersey New Jersey is a U.S. state, state located in both the Mid-Atlantic States, Mid-Atlantic and Northeastern United States, Northeastern regions of the United States. Located at the geographic hub of the urban area, heavily urbanized Northeas ...
,
Pennsylvania Pennsylvania, officially the Commonwealth of Pennsylvania, is a U.S. state, state spanning the Mid-Atlantic (United States), Mid-Atlantic, Northeastern United States, Northeastern, Appalachian, and Great Lakes region, Great Lakes regions o ...
,
Delaware Delaware ( ) is a U.S. state, state in the Mid-Atlantic (United States), Mid-Atlantic and South Atlantic states, South Atlantic regions of the United States. It borders Maryland to its south and west, Pennsylvania to its north, New Jersey ...
,
Maryland Maryland ( ) is a U.S. state, state in the Mid-Atlantic (United States), Mid-Atlantic region of the United States. It borders the states of Virginia to its south, West Virginia to its west, Pennsylvania to its north, and Delaware to its east ...
,
Virginia Virginia, officially the Commonwealth of Virginia, is a U.S. state, state in the Southeastern United States, Southeastern and Mid-Atlantic (United States), Mid-Atlantic regions of the United States between the East Coast of the United States ...
,
North Carolina North Carolina ( ) is a U.S. state, state in the Southeastern United States, Southeastern region of the United States. It is bordered by Virginia to the north, the Atlantic Ocean to the east, South Carolina to the south, Georgia (U.S. stat ...
,
South Carolina South Carolina ( ) is a U.S. state, state in the Southeastern United States, Southeastern region of the United States. It borders North Carolina to the north and northeast, the Atlantic Ocean to the southeast, and Georgia (U.S. state), Georg ...
,
Georgia Georgia most commonly refers to: * Georgia (country), a country in the South Caucasus * Georgia (U.S. state), a state in the southeastern United States Georgia may also refer to: People and fictional characters * Georgia (name), a list of pe ...
and
Florida Florida ( ; ) is a U.S. state, state in the Southeastern United States, Southeastern region of the United States. It borders the Gulf of Mexico to the west, Alabama to the northwest, Georgia (U.S. state), Georgia to the north, the Atlantic ...
(minus the western half of the
Panhandle A salient, panhandle, or bootheel is an elongated protrusion of a geopolitical entity, such as a subnational entity or a sovereign state. While similar to a peninsula in shape, a salient is most often not surrounded by water on three sides. Ins ...
), as well as the
District of Columbia Washington, D.C., formally the District of Columbia and commonly known as Washington or D.C., is the capital city and Federal district of the United States, federal district of the United States. The city is on the Potomac River, across from ...
. The command also included US Army forces in Newfoundland and, from April 1942,
Bermuda Bermuda is a British Overseas Territories, British Overseas Territory in the Atlantic Ocean, North Atlantic Ocean. The closest land outside the territory is in the American state of North Carolina, about to the west-northwest. Bermuda is an ...
. The initial subordinate commands included First Army, the
First First most commonly refers to: * First, the ordinal form of the number 1 First or 1st may also refer to: Acronyms * Faint Images of the Radio Sky at Twenty-Centimeters, an astronomical survey carried out by the Very Large Array * Far Infrared a ...
and
Third Air Force The Third Air Force (Air Forces Europe) (3 AF) is a Numbered Air Force, numbered air force of the United States Air Forces in Europe - Air Forces Africa (USAFE-AFAFRICA). Its headquarters is Ramstein Air Base, Germany. It is responsible for all U ...
s, and the
First First most commonly refers to: * First, the ordinal form of the number 1 First or 1st may also refer to: Acronyms * Faint Images of the Radio Sky at Twenty-Centimeters, an astronomical survey carried out by the Very Large Array * Far Infrared a ...
,
Second The second (symbol: s) is a unit of time derived from the division of the day first into 24 hours, then to 60 minutes, and finally to 60 seconds each (24 × 60 × 60 = 86400). The current and formal definition in the International System of U ...
, and
Third Third or 3rd may refer to: Numbers * 3rd, the ordinal form of the cardinal number 3 * , a fraction of one third * 1⁄60 of a ''second'', i.e., the third in a series of fractional parts in a sexagesimal number system Places * 3rd Street (di ...
Corps areas. However, in January 1942 the Third Air Force was moved inland and placed under
Air Force Combat Command The Air Combat Command (ACC) is one of nine List of Major Commands of the United States Air Force, Major Commands (MAJCOMs) in the United States Air Force, reporting to Headquarters, United States Air Force (HAF) at the Pentagon. It is the prim ...
. In September 1943 First Army and First Air Force were separated from the EDC. The 26th Infantry Division (26th ID) was initially available to the Eastern Defense Command for mobile defense, stationed in the command's area from December 1941 through mid-1943, though it may have been relieved of this duty earlier. In early 1942 this division was augmented by several
regimental combat team A regimental combat team (RCT) is a provisional major infantry unit which has seen use by branches of the United States Armed Forces. It is formed by augmenting a regular infantry regiment with smaller combat, combat support and combat servic ...
s, primarily regiments detached from divisions being "triangularized" (reducing from four infantry regiments to three). The 104th Infantry Regiment of the 26th ID continued on mobile defense duty through January 1943.'Massachusetts own 104th U.S. Infantry Regiment', published and distributed under the Auspices of the 104th U.S. Infantry Regiment Veterans' Association. The other units included at least the 111th, 113th, 181st (detached from the 26th ID), 366th, and 372nd Infantry Regiments. The 144th Infantry Regiment transferred in from the
Western Defense Command Western Defense Command (WDC) was established on 17 March 1941 as the command formation of the United States Army responsible for coordinating the defense of the West Coast of the United States, Pacific Coast region of the United States during Wo ...
in January 1943 and was withdrawn in March 1944. The mobile defense force lasted at least through early 1944. The commanding generals of the defense commands were initially the commanders of the existing Continental Army Commands established under the 1921 amendment to the
National Defense Act of 1916 The National Defense Act of 1916, , was a United States federal law that updated the Militia Act of 1903, which related to the organization of the military, particularly the National Guard. The principal change of the act was to supersede provi ...
(First through Fourth Armies). The first commander of the Eastern Defense Command was First Army commander
Lieutenant General Lieutenant general (Lt Gen, LTG and similar) is a military rank used in many countries. The rank traces its origins to the Middle Ages, where the title of lieutenant general was held by the second-in-command on the battlefield, who was norma ...
Hugh A. Drum. The command's headquarters was co-located with First Army headquarters and a soon-to-be-established Second Service Command at
Fort Jay Fort Jay is a coastal bastion fort and the name of a former United States Army post on Governors Island in New York Harbor, within New York City. Fort Jay is the oldest existing defensive structure on the island, and was named for John Jay, a m ...
,
Governors Island Governors Island is a island in New York Harbor, within the Boroughs of New York City, New York City borough of Manhattan. It is located approximately south of Manhattan Island, and is separated from Brooklyn to the east by the Buttermilk ...
in
New York City New York, often called New York City (NYC), is the most populous city in the United States, located at the southern tip of New York State on one of the world's largest natural harbors. The city comprises five boroughs, each coextensive w ...
. Lieutenant General
George Grunert George Grunert (July 21, 1881 – January 12, 1971) was a United States Army cavalry officer who worked his way up through the ranks from private to retirement as a lieutenant general. His 47-year career extended from the Spanish–American War ...
assumed command of the Eastern Defense Command upon Drum's mandatory retirement at age 64 in October 1943. As prospects for any enemy attack on the United States all but diminished, Central Defense Command was merged into the Eastern Defense Command on 15 January 1944. In early 1945, Southern Defense Command was also absorbed by the Eastern Defense Command.Conn, p. 44 With Grunert's retirement in July 1945, his deputy, Brigadier General Kenneth Lord, became interim commander until the appointment of General Jonathan M. Wainwright. This was Wainwright's first command since he was compelled to surrender the Philippines to the Japanese Army in early 1942. In August 1945, he was liberated from a Japanese prisoner of war camp and assumed command after he returned to full duty. Upon Wainwright's 15 January 1946 transfer to Fourth Army at
Fort Sam Houston Fort Sam Houston is a United States Army, U.S. Army post in San Antonio, Texas. "Fort Sam Houston, TX • About Fort Sam Houston" (overview), US Army, 2007, webpageSH-Army. Known colloquially as "Fort Sam", it is named for the first president o ...
, Lord assumed interim command until the abolition of Eastern Defense Command on 15 March 1946. Its residual staff and functions were transferred to 39th Headquarters and Headquarters Detachment, Special Troops, First Army as it returned from its combat assignment in Europe to its initial stateside posting at
Fort Bragg Fort Bragg (formerly Fort Liberty from 2023–2025) is a United States Army, U.S. Army Military base, military installation located in North Carolina. It ranks among the largest military bases in the world by population, with more than 52,000 m ...
, North Carolina.


Commanders

The following men served as Commanding General, Eastern Defense Command: * Lieutenant General Hugh A. Drum, 18 March 1941 – 8 October 1943 * Lieutenant General
George Grunert George Grunert (July 21, 1881 – January 12, 1971) was a United States Army cavalry officer who worked his way up through the ranks from private to retirement as a lieutenant general. His 47-year career extended from the Spanish–American War ...
, 8 October 1943 – 31 July 1945 * Brigadier General Kenneth P. Lord, (acting) 1 August 1945 – 28 September 1945 * General Jonathan M. Wainwright, 28 September 1945 - 11 January 1946 * Brigadier General Kenneth P. Lord, 11 January 1946 – 15 March 1946


See also

*
Western Defense Command Western Defense Command (WDC) was established on 17 March 1941 as the command formation of the United States Army responsible for coordinating the defense of the West Coast of the United States, Pacific Coast region of the United States during Wo ...
* Central Defense Command * Southern Defense Command *
Alaska Defense Command The Alaska Defense Command (ADC) was a military formation of the United States Army. It was established on 4 February 1941, responsible for coordinating the defense of the Alaska Territory of the United States. The first commanding general of ADC ...
* Caribbean Defense Command


References

* * * {{cite book , last=Stanton , first=Shelby L. , title=World War II Order of Battle , publisher=Galahad Books , year=1991 , isbn=0-88365-775-9 American Theater of World War II *World War II Military units and formations established in 1941 Military units and formations disestablished in 1946