His measures sparked a revolt by Bavarian nobles and the duke temporarily had to seek refuge at the court of the Frankish Mayor of the Palace Charles Martel.
In 741, Odilo married Charles Martel's daughter Hiltrud,[2] but upon the death of her father found himself at war with her brothers Carloman and Pepin the Short.
[3] He was finally defeated in 743 after a battle at the river Lech, and had to accept Frankish overlordship over Bavaria, but remained duke.
[3] He further consolidated his rule, when he came to the aid of Prince Boruth of Carantania against repeated Avar incursions and was able to vassalize the Slavic principality in the southeast.
However, the next year he was defeated by Pepin the Short who installed seven-year-old Tassilo III as Duke of Bavaria.