Seyyed Hassan Nasrallah hails�the movement's military commander Mustafa Badreddine, who was slain at the hands of Takfiri groups in Syria last month.
In a speech to mark 40 days since the killing of the commander, Nasrallah hailed him as a �strong and courageous commander� who never gave up defending the cause of the Lebanese resistance movement.
He said Badreddine believed Hezbollah had a big role to play in Syria and Iraq in defending the countries against the Takfiri militants.
The 55-year-old Hezbollah commander led Hezbollah's military wing, which�is helping the Syrian government drive out foreign-backed Takfiri terrorists from Syria.
The Hezbollah�leader added that Badreddine was involved in all phases of the conflict in Syria almost from the�onset of the foreign-backed militancy in the Arab country in 2011.
�Turkey and Saudi Arabia, which have brought thousands of militants to Syria in the past months, have failed in their plan to topple the Syrian government,� Nasrallah pointed out.
Nasrallah went on to say that Hezbollah forces�are fighting what he described as�"an American-Saudi Takfiri project that�threatens the whole region."
He also referred to Arab media reports that Hezbollah fighters were about to be defeated in the Syrian city of�Aleppo as �lies�, adding that over 600 terrorists were killed and some�80 tanks and�military vehicles were destroyed in joint operations with Syrian army forces�in the northwestern city in June alone.
Hezbollah fighters are fighting alongside Syrian government forces against a range of terrorist groups operating in the country, including Daesh and the al-Qaeda-affiliated al-Nusra Front.
The movement has been helping the Syrian army�to prevent the spillover of the crisis into Lebanon.
Nasrallah added that�the military campaign�in the city of Aleppo is�the "greatest battle" in Syria, vowing to send more fighters�to support Syrian�forces.
He also vowed that the slain Hezbollah commander's comrades will continue their unwavering resistance against�the Daesh Takfiri terrorists�and other militant groups wreaking havoc in the region.
Hezbollah�will�"increase its presence in Aleppo... because the real, strategic, greatest battle is in Aleppo and the surrounding area," Nasrallah said.
Badreddine�was�killed by�militant�artillery shelling near the Damascus International Airport on May 13.�He�also directed�military operations�against the Israeli invasion�of�Lebanon and was a frequent target of attempts by�Tel Aviv, Washington and its allies to assassinate or capture him.
Badreddine�was the cousin and brother-in-law of Imad Mughniyeh, who was assassinated by Israel�in 2008.