More than 130 civilians have been killed since hostilities escalated, according to the Syrian Observatory for Human Rights, a UK-based monitoring group.
Deraa and Quneitra had been relatively calm for almost a year because of a "de-escalation" agreement brokered by the US and Jordan, which support the opposition, and Russia, a staunch ally of the government.
But Mr Assad set his sights on regaining full control of the provinces after defeating rebels in the Eastern Ghouta region outside the capital Damascus in April.
His Excellency President Uhuru Kenyatta, President of Kenya receives a copy of the African Diaspora Today Magazine at the United Nations General Assembly (UNG73). By, AbdulRasheed Abubakar, International Content Editorial (News) CABNC-TV and Publisher: Diaspora Today Magazine.