Malawi and Zambia have had a close history for a long time.
They share common values, history, language, culture, and border.
They discuss issues of mutual concern including security.
Malawi, Zambia and Mozambique agreed to cooperate in the development of the Shire Zambezi Waterway, to allow for the transportation of goods in the area, and promote trade.
It would benefit Malawi and Zambia by reducing the transportation costs since they are landlocked.