Which american victory the united states to secure the alliance with france?

If i remember correctly, it was the battle (or siege)of Yorktown.

The judge must take into account the seriousness of the offence, the offender's background and prospects for rehabilitation, and the need to deter others from committing crimes. Judges also review the sentences other judges have imposed for similar crimes, to ensure the punishment is fair and fits the crime.
Hope that helps