DENVER - A group called Why Marriage Matters Colorado enlisted the help of veterans to create an ad highlighting marriage equality as a Denver-based federal court deliberates on Oklahoma's marriage ban.

The commercial features a gay veteran and three of his friends, from various branches of the armed forces, discussing how they feel about gay marriage.

"Together the four of us have over 45 years of military service," retired Air Force Sergeant Dennis Mont'Ros said in the advertisement.

"We have each other's back," Marine Sergeant Will Glenn said in the ad.

"I served in Iraq and Afghanistan. I'm gay, these guys are straight. But we're all veterans and we've all served our country," U.S. Air Force Master Sergeant T. Ashley Metcalf said in the ad.

"I've been married for 8 years, going on 9, happily married. And why shouldn't Ash, a good friend of mine, be afforded that same opportunity," retired Army Staff Sergeant Izzy Abbass asks in the commercial.

Abass told 9NEWS he hopes the commercial will make people rethink their position on same-sex marriage.

"My biggest hope is that people will think about the men and women who serve this county and say …you know what? If they're good enough to (fight for this country), they're good enough to have full, equal protection," Abass said.

The ad comes at a time when the 10th Circuit Court of Appeals, a Denver-based federal court, is hearing its second case on a voter approved gay-marriage ban in as many weeks.

The court heard an appeal to uphold a same-sex marriage ban from Utah last week and this week the court heard a similar appeal from the state of Oklahoma.

The cases are "under submission and the (judges) are working on a decision together," according Court Clerk Betsy Shoemaker. It is unclear when the court will issue a ruling

The commercial will air Monday during "The Voice."

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