Mutual Accord
Heirs of Númenor #5 (x3)

Action: Until the end of the phase, each Gondor card in play gains the Rohan trait, and each Rohan card in play gains the Gondor trait.

"These are the Rohirrim, as we name them, masters of horses... and have ever proved true to us, aiding us at need, and guarding our northern marches and the Gap of Rohan." –Faramir, The Two Towers