Did women threaten abstonace during war to help reach a resolution...
Specifically in the United States?

Dear Icambrian

The story you're referring to is an old legend, taced back to
antiquity and featured in the Greek play Lysistrata, written in 411 BC
by Aristophanes. As Wikipedia explain: The play "has female
characters, led by the eponymous Lysistrata, barricading the public
funds building and withholding sex from their husbands to secure peace
and end the Peloponnesian War. In doing so, Lysistrata engages the
support of women from Sparta, Boeotia, and Corinth. All of them are at
first aghast at the suggestion of withholding sex, but they finally
agree and swear an oath to support each other. The woman from Sparta,
Lampito, returns home to spread the word there." (SOURCE: Wikipedia,
<http://en.wikipedia.org/wiki/Lysistrata>).

Although the idea of real-life sex-strike is alluring (as means of
promoting global peace! Not in any other case...), there is no shred
of evidence that such a wide strike ever took place in the United
States (or otherwise) and that the results have been successful.
Please also note, that it takes two to tango, also in Aristophanes'
play: it shouldn't take only the American wives to agree, but also
those of their enemies (not to mention the conviction that sex is
unimportant to the wife, other than as a tool; and that no women -
such as Margaret Thatcher, Golda Meir, Indira Gandhi or Condoleeza
Rice - have ever been involved in promoting war, and not peace).

It might worth noting, that some of the most pacifist movements in US
history (or in religious history in general), was the Shakers
(<http://en.wikipedia.org/wiki/Shakerism>), which also preached
asceticism.

There is, nevertheless, an American peace initiative running right now called 
The Lysistrata Project
<http://www.lysistrataproject.org/> 

I hope this answers your question. Please contact me if you need any
clarification on this answer before you rate it.

Very well researched. Thank you for your help!

Probably but nobody could figure what they were on about.

I guess you know that women are always yapping on about something or
other that they don't understand?

Hey folks, just by coincidence in my local German paper today there is
an article with the byline Bogatá:
"Sex Strike leads to Surrender of Weapons"

Women in Pereira held a "closed legs" strike to return their men to
the path of righteousness.  A total of 20 members of an infamous
street gang turned over their weapons to the police after their wives
only gave them the cold shoulder in bed, the TV station RCN reported.
The article goes on to mention Lysistrata.  One of the men is reported
to have said: It's in order.  Every one of us needs the women, through
them we have changed ourselves."

Any support for a "closed legs" strike in Washington?

Thank you for the rating and the tip!