The U.S. celebrated its 71st anniversary of the U.S. Air Force on Tuesday, commemorating the day when the government gave the Air Force its own military branch in 1947.

The Air Force tweeted out a video Wednesday commemorating the occasion, paying tribute to the American airmen who served over the years.

The U.S. Air Force became an independent military branch on September 18, 1947, after the government officially authorized a separate Air Force branch under the National Security Act of 1947.

The Air Force, which was born during peacetime in the years following World War II, currently has more than 50 bases in the U.S. and several bases in Europe and Asia.

President Donald Trump wrote a tweet Wednesday acknowledging the anniversary of the youngest of the nation’s three military branches.

Happy 71st Birthday to our GREAT United States Air Force! https://t.co/r9Sa7DJQ76 — Donald J. Trump (@realDonaldTrump) September 18, 2018

“Happy birthday to our GREAT United States Air Force!” Trump tweeted.

Senators, government agencies, and different branches of the Air Force also penned celebratory tweets honoring the legacy of the Air Force:

Happy birthday to our @usairforce! For 71 years, whether in the air, in missile silos underground, or in space, the men and women of the Air Force have been standing ready to defend America around the globe. #AFBday #AF71 pic.twitter.com/unYg5OAjYN — Senator Ted Cruz (@SenTedCruz) September 18, 2018

Happy Birthday to the @usairforce! As we celebrate 71 years, we are especially proud of our airmen and women at @22ARW. #AFBday #AF71 pic.twitter.com/jZbcAamaNh — Senator Pat Roberts (@SenPatRoberts) September 18, 2018

Happy birthday to the @usairforce! Today we celebrate 71 years of breaking barriers, innovating and aiming high! Here’s to many more years of reaching for the stars! #AFBday #AF71 https://t.co/9dIOGWEoCg — AF Space Command (@AFSpace) September 18, 2018

Even the U.S. Embassy in London marked the occasion a day early with a celebratory cake: