The Horn of Africa is the name for the peninsula occupied largely by Somalia & Somaliland.
A bugle is a brass instrument related to the trumpet. You wouldn’t call it a horn in an orchestral context, but in other contexts it could be. In jazz and popular music, any woodwind or brass would be part of the “horn section”. And in a historical military context any smallish roundish brass instrument could be a horn, it just needs to perform a signalling function.
Spoilers
The Horn of Africa is the name for the peninsula occupied largely by Somalia & Somaliland.
A bugle is a brass instrument related to the trumpet. You wouldn’t call it a horn in an orchestral context, but in other contexts it could be. In jazz and popular music, any woodwind or brass would be part of the “horn section”. And in a historical military context any smallish roundish brass instrument could be a horn, it just needs to perform a signalling function.