There were no binders full of women at the final presidential debate on Monday, but there were certainly horses and bayonets.

President Barack Obama countered Mitt Romney's comment that the U.S. "Navy is smaller now than at any time since 1917" with a zinger that won the night.

"You mentioned the Navy, for example, and that we have fewer ships than we did in 1916," Obama told Romney. "Well, Governor, we also have fewer horses and bayonets, because the nature of our military's changed."

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The "horses and bayonets" comment delighted the Twittersphere: The hashtag #horsesandbayonets became the number one trend on Twitter in the U.S. and third in the world. At one point, the phrase was mentioned on Twitter nearly 60,000 times in one minute, according to data from Tospy, a social web analytics tool.

The Obama campaign capitalized on the traffic, buying the search term "Bayonets" on Twitter, HuffPost's Mat Yurow noted.

Within minutes of Obama's comment, a "Horses and Bayonets" Tumblr featuring GIFs and images went live, and a Horses and Bayonets Facebook page already has more than 3,000 likes.

You now have about a week to design your [sexy] horses and bayonets Halloween costumes.

Excerpt from debate transcript, via ABC News:

ROMNEY: Our Navy is old -- excuse me, our Navy is smaller now than at any time since 1917. The Navy said they needed 313 ships to carry out their mission. We're now at under 285. We're headed down to the low-200s if we go through a sequestration. That's unacceptable to me.

I want to make sure that we have the ships that are required by our Navy. Our Air Force is older and smaller than at any time since it was founded in 1947.
...

OBAMA: You mentioned the Navy, for example, and that we have fewer ships than we did in 1916. Well, Governor, we also have fewer horses and bayonets, because the nature of our military's changed. We have these things called aircraft carriers, where planes land on them. We have these ships that go underwater, nuclear submarines.

And so the question is not a game of Battleship, where we're counting slips. It's what are our capabilities. And so when I sit down with the secretary of the Navy and the Joint Chiefs of Staff, we determine how are we going to be best able to meet all of our defense needs in a way that also keeps faith with our troops, that also makes sure that our veterans have the kind of support that they need when they come home.

Click over to ABC News for the full transcript.

And, because we can, here are Romney and Obama on horseback with bayonets. The end.

obamahorsesbayonets

(Original Romney on horse photo: Ethan Hill, Contour by Getty Images. Obama: Pablo Martinez Monsivais, Associated Press. Photo illustration by HuffPost)

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    Republican presidential candidate Mitt Romney gestures beside his wife Ann following the third and final presidential debate with US President Barack Obama at Lynn University in Boca Raton, Florida, October 22, 2012. The showdown focusing on foreign policy is being held in the crucial toss-up state of Florida just 15 days before the election and promises to be among the most watched 90 minutes of the entire 2012 campaign. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/Getty Images)

  • US-VOTE-2012-DEBATE

    Republican presidential candidate Mitt Romney gestures following the third and final presidential debate with US President Barack Obama at Lynn University in Boca Raton, Florida, October 22, 2012. The showdown focusing on foreign policy is being held in the crucial toss-up state of Florida just 15 days before the election and promises to be among the most watched 90 minutes of the entire 2012 campaign. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/Getty Images)

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    US President Barack Obama (R) greets Republican presidential candidate Mitt Romney (L) following the third and final presidential debate at Lynn University in Boca Raton, Florida, October 22, 2012. The showdown focusing on foreign policy is being held in the crucial toss-up state of Florida just 15 days before the election and promises to be among the most watched 90 minutes of the entire 2012 campaign. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/Getty Images)

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    BOCA RATON, FL - OCTOBER 22: U.S. President Barack Obama debates with Republican presidential candidate Mitt Romney at the Keith C. and Elaine Johnson Wold Performing Arts Center at Lynn University on October 22, 2012 in Boca Raton, Florida. The focus for the final presidential debate before Election Day on November 6 is foreign policy. (Photo by Michael Reynolds-Pool/Getty Images)

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    Republican presidential candidate Mitt Romney debates on October 22, 2012 during the third presidential debate at Lynn University in Boca Raton, Florida. The final debate before the November 6 election is focusing on foreign policy. AFP PHOTO / Saul LOEB (Photo credit should read SAUL LOEB/AFP/Getty Images)

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    Republican presidential candidate Mitt Romney listens during the third and final presidential debate with US President Barack Obama at Lynn University in Boca Raton, Florida, on October 22, 2012. The showdown focusing on foreign policy is being held in the critical toss-up state of Florida just 15 days before the election and promises to be among the most watched 90 minutes of the entire 2012 campaign. AFP PHOTO Jewel Samad (Photo credit should read JEWEL SAMAD/AFP/Getty Images)

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    BOCA RATON, FL - OCTOBER 22: U.S. President Barack Obama (R) debates with Republican presidential candidate Mitt Romney at the Keith C. and Elaine Johnson Wold Performing Arts Center at Lynn University on October 22, 2012 in Boca Raton, Florida. The focus for the final presidential debate before Election Day on November 6 is foreign policy. (Photo by Marc Serota/Getty Images)

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    US President Barack Obama and Republican presidential candidate Mitt Romney participate in the third and final presidential debate at Lynn University in Boca Raton, Florida, on October 22, 2012. The final debate before the November 6 election is focusing on foreign policy. AFP PHOTO / Jewel Samad (Photo credit should read JEWEL SAMAD/AFP/Getty Images)

  • US-VOTE-2012-DEBATE

    US President Barack Obama debates in the third and final presidential debate at Lynn University in Boca Raton, Florida, on October 22, 2012. The final debate before the November 6 election is focusing on foreign policy. AFP PHOTO / Jewel Samad (Photo credit should read JEWEL SAMAD/AFP/Getty Images)

  • President Barack Obama speaks during the third presidential debate with Republican presidential nominee Mitt Romney at Lynn University, Monday, Oct. 22, 2012, in Boca Raton, Fla. (AP Photo/David Goldman)

  • Obama And Romney Spar In Final Debate Before Presidential Election

    BOCA RATON, FL - OCTOBER 22: Republican presidential candidate Mitt Romney speaks during a debate with U.S. President Barack Obama at the Keith C. and Elaine Johnson Wold Performing Arts Center at Lynn University on October 22, 2012 in Boca Raton, Florida. The focus for the final presidential debate before Election Day on November 6 is foreign policy. (Photo by Marc Serota/Getty Images)

  • Republican presidential nominee Mitt Romney speaks during the third presidential debate with President Barack Obama at Lynn University, Monday, Oct. 22, 2012, in Boca Raton, Fla. (AP Photo/Eric Gay)

  • Republican presidential nominee Mitt Romney, left, listens to President Barack Obama during the third presidential debate at Lynn University, Monday, Oct. 22, 2012, in Boca Raton, Fla. (AP Photo/Eric Gay)