Linked from
The 28 pages that link to East Francia, each with the reason it gives.
Charles the FatNarrower topic: It was Charles’s first major kingdom and the base of his power.
Duchy of SaxonyNarrower topic: Saxony became a leading duchy within this kingdom.
Battle of LechfeldNarrower topic: Otto’s kingdom faced repeated Magyar incursions before the battle.
Otto the GreatNarrower topic: It was the kingdom Otto ruled before acquiring the imperial title.