"They told a story, they told a lie, and the public opinion around the world and in the West didn't buy their story, but they couldn't withdraw", he said.
Damascus has repeatedly stated that the presence of Russian, Iranian and other allied forces in the country is legitimate, since they are in the country on the invitation of the Syrian government.
Earlier in May, U.S. President Donald Trump walked away from the 2015 global nuclear accord under which world powers lifted some economic sanctions on Iran in exchange for curbs on its disputed atomic energy program.
He also warned that the USA should learn the lesson of Iraq and remove its troops from Syria.
More strikes by USA ally Israel have further raised fears that the devastating seven-year war could still escalate.
The Douma attack triggered missile strikes on Syria by the United States, Britain and France which they said targeted Assad's chemical weapons programme.
It also said that during this period "at least 892 civilians have been unintentionally killed by Coalition strikes since the start of Operation Inherent Resolve". He added that "it is important to continue the dialogue between us and keep an open line between the IDF and the Russian military on all pertaining issues".
Assad also said that crippling Syria's air defenses was one of the original tactics used by the "mercenaries" at the beginning of the conflict, and that it was never created to aid the "peaceful demonstrators", but would certainly help in case of a foreign military intervention to depose the government. "If not, we're going to resort to. liberating those areas by force, ' he said, adding 'the Americans should leave, somehow they're going to leave".
"The majority of the people who were against the government.in the different liberated areas, actually in their hearts they are with the government", Assad said.
North Korean Media: Denuclearization Will Happen on Pyongyang’s ‘Timetable’
A "pre-advance" team of USA officials has also traveled to Singapore to meet with North Koreans there, the White House said. The administration is arguing that if the North Koreans want security, it can not come from nuclear weapons.
U.S. Defence Secretary Jim Mattis said on April 30 the United States and its allies would not want to pull troops out of Syria before diplomats win the peace.
"This is not my language, so, I can not use similar language. It represents him, and I think there is a well-known principle, that what you say is what you are".
In his interview with RT, Assad also accused Israel of lying about Iranian troops on the ground in Syria.
Israeli Prime Minister Benjamin Netanyahu has warned his government would not allow Iran to maintain a military presence anywhere inside Syria.
Assad also sought in his interview to minimize the extent to which his government receives support from Iran.
"We were close to having direct conflict between the Russian forces and the American forces".
If Bashar Assad is winning the hearts of the surviving Syrians, he did it by stopping a horrific amount of hearts and driving 13 million people out of their homes, half of them leaving the country entirely.
He said that Syria's air defences were now much stronger than before thanks to Russian Federation.