Tyson Fury has promised he would go to war for England as he praised those attempting to defend Ukraine from Russia's invasion.
The British heavyweight vowed to follow the lead of the likes of brothers Wladimir and Vitali Klitschko and Oleksandr Usyk if his homeland issues a call to arms.
WBC champion Fury said he would be "first in line" if civilians were to be conscripted.
Vitali Klitschko is mayor of Kyiv, while his brother and fellow former world heavyweight champion Wladimir has joined a territorial defense brigade. Usyk, a reigning world heavyweight champion, has also signed up, as has fellow star boxer Vasiliy Lomachenko.
Fury said in a news conference on Tuesday: "Fantastic. I'll be the first one to join up if England get involved or America. I'll be first in line for the job.
"My dad will as well, me and all the boys will be signing up to defend. So that's what I've got to say.
"If you're from that country and living there, defend it. Love your woman and fight for your country, that's what I say."
Fury puts his WBC heavyweight belt on the line against Dillian Whyte at Wembley Stadium on April 23.
It remains to be seen when the likes of Usyk and Lomachenko become available to resume their sporting careers
Frank Warren, Fury's co-promoter, said: "Everybody should be absolutely pulling for Ukraine, standing up to the bully, standing up for democracy.
"Those four fighters, everybody should be behind them. It's magnificent what they're doing."