The United States announced on Saturday more than $630 million in aid for Nigeria, Somalia, South Sudan and Yemen.
Eritrea President Isaias Afwerki has blamed the US for a border conflict with Ethiopia that killed an estimated 70,000 people between 1998 and 2000.
A US soldier has been killed in Somalia during an operation against extremist group Al-Shabaab.
The Unites States government has approved the sale of twelve American-made helicopter gunships to Keny, as the country seeks to further build its military in the face of growing insecurity.
When Trump won the US presidential election late last year there was a global sense that something big – and perhaps not all that positive – had just happened. Talk of building walls, banning Muslims and rewriting international trade deals
The US has imposed further sanctions on Eritrea, this time for attempting to buy military equipment from North Korea.
The US is gearing up to increase its military presence in Somalia, as it looks to stop the spread of Al-Shabaab and other terrorist groups in the country.
The Pentagon has denied claims from Somali-based militant group Al-Shabaab that one of its drones has crashed in the Horn of Africa country.