From TC-3-21.5:

From the earliest times, warriors used a banner or other symbol to identify specific units and to serve as a rallying point for troops. In medieval days, the standard or banner was used to signal a general assault, which was generated by a cry of “Advance your banners.” Until comparatively recent years, the flags that identified nations usually were based on the personal or family heraldry of the reigning monarch or ruling nobleman. As autocracies faded or disappeared, dynastic colors were no longer popular and national flags, as thought of today, came into being. These national flags, such as the Union Jack of Great Britain, the Tricolor of France, and the Stars and Stripes, are relatively new to history. 

Flags are almost as old as civilization itself. Imperial Egypt as well as the armies of Babylon, Chaldea, and Assyria followed the colors of their kings. The Old Testament frequently mentions banners and standards. Many flags of different designs were present in parts of the American colonies before the Revolution. When the struggle for independence united the colonies, the colonists wanted a single flag to represent the new nation. The first flag borne by the Army as a representative of the 13 colonies was the Grand Union flag. It was raised over the Continental Army at Cambridge, Massachusetts, on 2 January 1776. That flag had the familiar 13 stripes (red and white) of the present flag, but the blue square contained the Crosses of St. George and St. Andrew from the British flag. 

The Stars and Stripes was born on 14 June 1777, two years to the day after the birth of the Army. On that date, Congress resolved that the flag of the United States be 13 stripes, alternate red and white, and that the union be 13 stars, white in a blue field, representing a new constellation. The arrangement of the stars on the blue field was not specified: 

Before the Civil War, in lieu of a National Color, the U.S. Soldiers carried a blue silk color on which was embroidered the arms of the United States, and an American eagle bearing a shield on its breast, and in its talons an olive branch and arrows, signifying peace and war. After the National Color was authorized, the organizational color with the eagle became the regimental color. Because of the high casualty rate among the members of the Color party, plus the advent of modern weapons, the time-honored practice of carrying the Colors in battle was discontinued. Today, the Colors, with battle streamers attached, join their unit in formations during ceremonies to signify their presence during past battles.



 442nd Regimental Combat Team "Go for broke!"

The 442nd RCT was activated on February 1, 1943 at Camp Shelby Mississippi. The 442nd Regimental Combat Team was composed of Japanese American volunteers from the internment camps, Hawaii, states outside of the west coast exclusion zone, and Japanese American soldiers who were already serving in the U.S. Army when the war broke out.

Historically there have been two events per year where California State Guard color guard are asked to carry the 442nd's colors: 

              - The Torrance Armed Forces Day Parade -- The Annual Armed Forces Day Parade begins at Crenshaw Boulevard traveling west on Torrance Boulevard and ending at Madrona Avenue. All streets intersecting the parade route will be closed the majority of the day. Torrance's parade is the longest-running Armed Forces Day Parade in the nation. As one of few cities designated by the Department of Defense, the City of Torrance is proud to honor the men and women of our nation's Armed Forces.

                - The Los Angeles Nisei Week Grand Parade