Literal question
<svar a=" PR05A471 PR05A472 PR05A473 PR05A475 PR05A476 PR05A477 PR05A478 PR05A561 PR05A562 PR05A563" v="PR05A471 PR05A472 PR05A473 PR05A474 PR05A475 PR05A476 PR05A477 PR05A478 PR05A561 PR05A562 PR05A563">21. When did this person serve on active duty in the U.S. Armed Forces?<br /><div class="i1">Mark [X] in a box for each period in which this person served.<br />[] September 2001 or later<br />[] August 1990 to August 2001 (including Persian Gulf War)<br />[] September 1980 to July 1990<br />[] May 1975 to August 1980<br />[] Vietnam era (August 1964 to April 1975)<br />[] March 1961 to July 1964<br />[] February 1955 to February 1961<br />[] Korean War (June 1950 to January 1955)<br />[] January 1947 to June 1950<br />[] World War II (December 1941 to December 1946)<br />[] November 1941 or earlier</div><br /></svar>