A few of things.

1: Having an "Let's launch an invasion in the first post just because" is sort of anathema in Precipice now. We like shit to build up at least a little.

2: Which battle are you referring to? Djibouti is on the Red Sea, and the Battle of the Suez is old news.

3: I don't quite understand what is happening with Mozambique and Tanganyika. Those nations aren't allied with Spain, they chickened out of their treaty obligations because they are afraid of Spain. They have nothing to gain by falling in league with Spain, politically or militarily, they just don't want to be involved in the war at all. An invasion of either of them would still be seen as an act of aggression by Ethiopia, even if it is preoccupied right now.