This article lists a timeline of notable political rivalries by country. Political party rivalries are not to be confused with rival family houses within a nation, or warring factions from different nations. This list will not indicate every rival political party within a nation, such as in multiple-party governments. Only the most notable and significant political parties are presented. Rival political alliances may be included as well.
Ancient to Medieval rivalries
Early modern to present
Starting in 1992, sextennial presidential elections allows political realignment to take place, with administration (government) and opposition coalitions taking shape. These won't become apparent after the election, and cements into the mid-term election three years later. The process repeats in the next presidential election.
