Grim-faced and sorrowful, former soldiers and Marines sat before an audience of several hundred yesterday in Silver Spring and shared their recollections of their service in Iraq.

The stories spilled out, sometimes haltingly, sometimes in a rush: soldiers firing indiscriminately on Iraqi vehicles, an apartment building filled with Iraqi families devastated by an American gunship. Some descriptions were agonized, some vague; others offered specific dates and locations. All were recorded and streamed live to the Web.

The four-day event, "Winter Soldier: Iraq & Afghanistan -- Eyewitness Accounts of the Occupations," is sponsored by Iraq Veterans Against the War and is expected to draw more than 200 veterans of the two wars through tomorrow. Timed for the eve of the fifth anniversary of the war's start next week, organizers hope the soldiers' accounts will galvanize public opposition.