expression
with (someone's) help
Formal expression meaning 'thanks to the help of' or 'with the assistance of'. Often used in acknowledgments or formal statements.
彼の助力によって、プロジェクトは成功した。
With his help, the project succeeded.
皆様の助力によって、このイベントを無事に終えることができました。
Thanks to everyone's assistance, we were able to complete this event successfully.
助力 (assistance) + によって (by means of). 助力 is a Sino-Japanese compound, and によって is the te-form of 依る (to depend on), here functioning as a formal case particle.