Payment: Property Damage at Neighbor's Yard Before I Purchased My Home

Am I responsible for damage to my neighbors yard caused by a pool leak that occurred prior to me buying the home? Leak has been repaired, however damage has already existed before I purchased the home. Tried working with neighbor in going 50/50 with the repair of the fence that blew down during a wind storm. Neighbor claims that foundation was also the cause of the instability of the fence through the pool leak that happened prior to my residency. Wants me to pay for all damages and repair at 100%.

Payment: Property Damage at Neighbor's Yard Before I Purchased My Home