The alliance named National Democratic Front (NDF) is consistedof the All Peoples Congress, the Party for Unity, Democracy and Development, the Reform Party, Zambia Republican Party and the Zambia Development Congress.
A memorandum of understanding among the five political parties was signed by the leaders of the parties.
Patriotic Front leader Michael Sata who was scheduled to be part of the alliance pulled out at the last minute.
The NDF is the third opposition alliance formed this month in Zambia. On March 1 and 7 two other alliances were formed to challenge the ruling Movement for Multiparty Democracy (MMD) in the elections late this year.