The evidence confirms historical tensions between Ethiopia and Eritrea (Wikipedia: Eritrean–Ethiopian War; Wikipedia: Eritrea–Ethiopia relations). However, the provided web search results discuss tensions in the Strait of Hormuz, not specifically the ongoing political dominance between Ethiopia and Eritrea. The evidence is insufficient to corroborate that the tension *continues to dominate* the political situation based on multiple independent reports.

The web search results state that Eritrea officially seceded from Ethiopia in 1993, leaving Ethiopia landlocked. While this establishes the context, the evidence does not explicitly state that the loss of Red Sea access *resulted* directly from this 1993 secession in a definitive, single narrative confirmed by multiple sources.

One web search result mentions that Eritrea allowed Ethiopia to use the Assab port duty-free since gaining independence in 1991, specifically noting this applied to imports and exports before 1997. No other source corroborates the initial agreement period or the duty-free nature.

The evidence mentions the border war ended in June 2000, and a peace agreement followed. However, the specific claim that a 'renewed border conflict in the late 1990s' ended the duty-free arrangement is only implied by the context of the sources, not directly stated as the cause of the end of the arrangement.

The evidence confirms the 2018 peace process between Ethiopia and Eritrea (web_search: What Lies Ahead for Ethiopia-Eritrea Relations...). However, the claim that this agreement *would have offered* the opportunity to secure easy sea access with guarantees is an interpretation or opinion presented in the source material, not a verifiable fact confirmed by multiple independent reports.