Warriors Orochi - SW Chapter 7-X - Battle of Kanegasaki | Unlock Tadakatsu Honda 4/4

Unlocking Tadakatsu here requires you to not have a single ally retreat, protect the messenger, defeat Lu Bu personally, and WAIT for the reinforcements to appear. Tadakatsu likes to make his objectives specific where as Lu Bu just gets a simple "defeat me". -_-

Anyways, you'll want to defeat one of the generics at the south first and then defeat Zhang He in the middle so your allies guarding the main camp don't get killed. Then you wanna escort the messengers as fast as possible to reach Yasumasa on the far right because he's the most likely to die. Don't ever leave the messenger's side. When Lu Bu appears, Tadakatsu will follow, make sure to let their dialogue play out. Then defeat Lu Bu yourself, thankfully the messenger just goes in a corner until he's gone. Then go down and rescue Yasumasa, then finish up any remaining officers besides Masamune, wait for reinforcements to arrive (Xiao Qiao will say something) and then defeat Masamune. If this is the last stage you had to impress Tadakatsu, you'll unlock him.