His choice of words recalled a similar claim associated with President George W Bush following the US-led invasion of Iraq.
These words haunted former President George W. Bush, even though he never actually made the infamous statement.
Russian President Vladimir Putin on Saturday reaffirmed Russia's view that the purported chemical attack was a fake, criticizing the US and its allies for launching the strike without waiting for inspectors from the Organization for the Prohibition of Chemical Weapons, the global watchdog group, to visit the area. Three sites were targeted: Barzeh research and development centre in Damascus; Him Shinshar chemical weapons storage site, west of Homs; and Him Shinshar chemical weapons bunker, also west of Homs.
Although officials said the singular target was Assad's chemical weapons capability, his air force, including helicopters he allegedly has used to drop chemical weapons on civilians, were spared. Under the War Powers Resolution, the president must keep Congress informed of such actions. That did not mean military strikes would continue.
MSNBC host Joy-Ann Reid tweeted, "Saying "mission accomplished" always works out well for presidents".
"This is not about regime change ..." Instead, a coordinated and prolonged campaign to militarily destroy ISIS has been the focus of the US intervention, and Trump has vowed to withdraw the USA from the conflict once this has been achieved; to the dismay of many of his military advisors.
The strike on Syria does not represent a change in USA policy in Syria, senior administration officials revealed Saturday. "Use often!" U.S. military officials said the air strikes took out "the heart" of Syria's chemical weapons facilities, but it remained to be seen how Syria would respond.
It is generally accepted that, alongside the anti-ISIS military campaign, the USA and its allies are not interested in regime change in Syria.
Assad hosted a meeting with the politicians, and is reported by state media to have told his visitors that the US, Britain and France had waged a campaign of "lies and misinformation" against Russian Federation and Syria.
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Trump's United Nations ambassador Nikki Haley said she spoke with the president yesterday morning and he reiterated that American forces wouldn't hesitate to strike if Assad used chemical weapons again.
If the USA genuinely cared about the Syrian people over its regional power aspirations, then its anti-chemical weapons policy would have been consistent.
Trump's tweet Saturday appeared to be referring to the success of the strike, but whether or not the Assad regime will be deterred from using chemical weapons remains to be seen. Repeated indiscriminate use of other unconventional weapons in Syria vastly outweighs the destruction caused by chemical weapons, yet only now is action taken.
Assad and Russian Federation deny using chemical weapons. The answer is only "may be".
'I knew they would seize on this but felt it is such a great Military term, it should be brought back.
What happens next, she said, is up to Assad and to his Russian and Iranian allies.
She added that while the mission in Syria remains defeating the Islamic State, which has seen its grip weaken in the region in recent months, the USA will not allow Assad to attack "innocent Syrian people".
The UN Security Council has been paralysed in dealing with the seven-year Syrian conflict and the alleged use of chemical weapons. Nevertheless, Assad has nearly won the war and much of the fiercest fighting is over, meaning the rewards for using chemical weapons are much reduced.