"We are going to work this out to get lasting peace in the party," he promised, adding that the party's National Executive Committee (NEC) would deal with woes affecting the party.
Mr Thabane who was flanked by his wife and other ABC big wigs including Prime Minister Dr Moeketsi Majoro was addressing scores of his supporters at his constituency in Ha Abia on Sunday.
The members were drawn from all the 80 constituencies of the country.
Mr Thabane said his party faced a myriad of challenges in the past but they buried hatchet as the party and moved on.
But his party recently experienced yet more challenges with some members defecting to form new parties.
Former ABC deputy leader Professor Nqosa Mahao defected along with some MPs to form Basotho Action Party (BAP) while the Mokhotlong MP Tefo Mapesela formed Basotho Progressive Party (BPP).
"This will not frustrate us," Mr Thabane said, adding that the struggle still continues.
The journey he said needs patience and perseverance.