Donald Bradman's performance in the 1930 Ashes series was pivotal in securing Australia's victory over England. During this series, Bradman made an extraordinary impact, scoring a total of 974 runs at an astonishing average of 139.14 across the five Test matches. This included two double centuries, with his highest score being 334, which was also the highest individual score in Test cricket at that time.

Bradman's batting prowess not only provided Australia with crucial runs but also instilled confidence in his teammates. His ability to dominate bowlers and consistently score runs under pressure was a key factor in Australia winning the series 4-1. This performance solidified his reputation as one of the greatest cricketers of all time and marked a significant moment in cricket history.

In addition to his runs, Bradman's strategic approach to batting and his mental fortitude contributed to the team's overall morale and performance. His presence at the crease often shifted the momentum in favor of Australia, making it difficult for the English bowlers to find their rhythm.

For a more in-depth look at Bradman's performance and its impact on the series, you can refer to this detailed analysis: ESPN Cricinfo.

If you have any more specific questions about Bradman or the 1930 Ashes series, feel free to ask!