"The US should know that we would raze Tel Aviv and Haifa to the ground in the event of a military attack on us", General Yadollah Javani, head of the guard's political bureau, was quoted as saying.
"We will not let America become victorious..."
US National Security Adviser John Bolton, who in 2017 expressed hope Iran's "revolution will not reach its 40th birthday", tweeted that after four decades the "Islamic Republic of Iran has failed to fulfill its promises to uphold and safeguard the rights of its citizens".
The 10-day period from the return of Imam Khomeini until the revolution's victory is celebrated annually in Iran, and is known as the Ten-Day Fajr (Dawn).
In a speech at Tehran's Azadi (Freedom) square, Rouhani said US efforts to isolate Iran would fail.
Ceremonies were held across Iran today to observe the anniversary of the fall of the Shah and the triumph of Ayatollah Ruhollah Khomeini, the Shiite cleric who led the coup.
There's also a huge display of domestically-developed military equipment, including drones, missiles, bombs, and weapons.
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The fourth and final day of action was delayed when hail began coming down, as the Pebble Beach Pro-Am Twitter account showed. Casey also closed Monday's play with a birdie putt at 18 to finish alone in second at 16 under.
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Arsenal are still the only Premier League side not to have kept a clean sheet this season but Emery was more pleased with the win. Unai Emery felt Arsenal controlled the majority of the game as they beat Huddersfield 2-1 in the Premier League .
Demonstrator loses hand at Paris ‘yellow vest’ march
Paris police said a demonstrator lost four fingers when riot officers stopped protesters from storming the National Assembly. An injured policeman in riot gear is given help during a demonstration by the yellow vests in Paris on February 9, 2019.
State TV showed crowds defying rainy weather and carrying Iranian flags while shouting anti-Israeli and anti-US slogans.
Ballistic missile capabilities were on show during the main march, including the Qadr F, a ground-to-ground missile with a range of 1,950 km., according to Tasnim news agency.
The state has played up this year´s anniversary as 40 is symbolic of maturity in the Islamic tradition and the age at which Prophet Mohammed received revelations from God. 40 years of repression.
This year's celebrations come amid heightened tensions with the United States, which last year withdrew from the 2015 nuclear agreement between Tehran and world powers and reimposed tough sanctions on the Iranian economy.
"The Iranian people have and will have some economic difficulties [due to the sanctions] but we will overcome the problems by helping each other", Rouhani said in his address. One had the face of Trump and the other the face of Israeli Prime Minister Benjamin Netanyahu. "They must leave the region", said Brig. "They should take this into account".
Washington and the Arab world have viewed Iran with great suspicion since the Islamic Revolution, fearing Khomeini's radical ideology would inspire militants across the Middle East.
Today, Iran enjoys influence through proxies in Iraq, Syria, Lebanon and Yemen, raising concerns in Sunni Saudi Arabia, which accuses its rival of trying to dominate the Middle East. Tehran denies the allegations.