Although the Germanic tribes that forcibly migrated into southern and western Europe in the 5th century were _______ converted to Christianity, they retained many of their customs and ways of life.
Although the Germanic tribes that forcibly migrated into southern and western Europe in the 5th century were _______ converted to Christianity, they retained many of their customs and ways of life.
Explanation
"Ultimately" means in the end or eventually, which fits the idea of gradual conversion over time.
It contrasts with the Germanic tribes initially resisting but eventually accepting Christianity while keeping their traditions.