Der, die or das?
neuter noun · alliance · level B1
die Bündnisse - in the plural, every German noun takes the article die.
No guessing needed: -nis → das · 0.5% (but Kenntnis, Erkenntnis are die) "Bündnis" follows the rule Nouns ending in -nis, which covers 11 words in the Genau course.