Where is Aba, Nigeria? Map of Aba

Which state is Aba in Nigeria?

Aba is a city located in southeastern Nigeria. Other merged villages of Ohazu due to administrative convenience. It was established by the Ngwa clan of Igbo of the People of Nigeria as a trading city.
The Aro Expedition, which was part of the largest military plan to quell anti-colonial sentiment in the region, was carried out in the Aba area: the British colonial administration placed a military post in 1901.

What is the capital of ABA?
How long is journey from Lagos to Abia?
How many markets are in ABA?