Former U.S. President George W. Bush mistakenly decried the "brutal and unjustified" invasion of Iraq in a Freudian slip he made during a speech on Russia's invasion of Ukraine in Texas on Wednesday.

Bush made the comments in a speech during an event in Dallas, while he was criticizing Russia's political system.

"The result is an absence of checks and balances in Russia, and the decision of one man to launch a wholly unjustified and brutal invasion of Iraq," Bush said, before correcting himself and shaking his head. "I mean, of Ukraine."

He jokingly blamed the mistake on his age as the audience burst into laughter.

In 2003, when Bush was president, the United States led an invasion of Iraq over weapons of mass destruction that were never found. The prolonged conflict killed hundreds of thousands of people and displaced many more.

Bush's remarks quickly went viral on social media, garnering over 3 million views on Twitter alone after the clip was tweeted by a Dallas News reporter.

The former U.S. President also compared Ukrainian leader Volodymyr Zelenskyy to Britain's wartime leader Winston Churchill, while condemning Russian President Vladimir Putin for launching the invasion of Ukraine in February.

"The way countries conduct elections is indicative of how their leaders treat their own people, and how nations behave toward other nations," Bush said. "And nowhere is this on display more clearly than Ukraine," he said.

On Jan 10, 2007, Washington announced it would send an additional 20,000 troops to Iraq where the violence continued with momentum. On Feb. 27, 2009, then-President Barrack Obama said U.S. troops would withdraw from Iraq by late 2011.

British troops left Iraq on May 22, 2011, and U.S. troops left on Dec. 18 the same year.