A brief instruction for those who are still trying to find new Hero Talent which increases the speed of troops marching to fight another player:
1️⃣ Click on a portrait of your avatar to open Characters menu,
2️⃣ Open Hero Talents interface by clicking a green button with Talent point icon under equipment slots,
3️⃣ Choose 'Expert battle tactics' section,
4️⃣ There you will be able to learn two separate Talents 'March speed against another player I' and 'March speed against another player II' with 20 levels for each.