The Elder Scrolls V: Skyrim Special Edition

Follow the guide for the War Hero achievement, this picks up right where that guide leaves off.

You should have just completed the quest "The Battle for Fort Greenwall" and have an objective to talk to General Tullius

coc solitudecastledour
Talk to the General and accept the next mission

player.moveto 198bb
Talk to Legate Rikke

setstage cwmission04 200
coc solitudecastledour
Talk to the General and receive your new title

player.moveto 198bb
Talk to Legate Rikke again

coc solitudecastledour
Talk to the General and accept the next mission

player.moveto 198bb
Talk to Legate Rikke

setstage cwfortsiegefort 9000

At this point I had to travel back and forth between General Tullius and Legate Rikke a couple times to get the "Battle for Windhelm" quest to appear.

coc windhelmstables

Exit the building and run up to the gate towards the quest marker. Listen to General Tullius' speech and follow the soldiers into Windhelm. Run past all the soldiers smashing through the barriers and enter Palace of the Kings. Run up to Ulfric Stormcloak and wait for the dialogue. When the fighting starts use the kill command on Galmar Stone-Fist, then on Ulfric Stormcloak. After you or General Tullius kill Stormcloak the achievement will pop.

This achievement can be obtained by completing the sidequests of the civil war for Skyrim.

There are two ways to be done:
1. Follow the questline of the Stormcloaks to capture Solitude, or
2. Follow the questline of the Imperials to capture Windhelm.

It does not matter who you allied with on the first mission. What matters is which of the questlines you follow.

It does not matter who you favored in the Greybeards War Concil, but your choices can change the questline.

To join the Stormcloaks, travel to Windhelm and speak to Ulfric Stormcloak.
To join the Imperials, travel to Solitude and speak to General Tulius.

Good luck.

Two tips:

1. If the chain bugs around meeting people, just go to the next fort/city and attack solo. Your troops will eventually catch up. I was playing Imperials and was repeatedly unable to find anyone to report to prior to an attack. For the last mission General Tulius was ready sword drawn...but in Solitude. He had no dialogue to start the attack despite being in a combat pose.
I just led a one man raid on Windhelm and the troops caught up.

2. If the achievement doesn't pop, kill something. For me I got it 20 minutes after I finished the chain when I killed a giant fighting my steward. Random but it worked.