What's the difference between courageous and mettlesome?

Courageous

Definition:

(a.) Possessing, or characterized by, courage; brave; bold.

Example Sentences:

(1) I know I have the courage to deal with all the sniping but you worry about the effects on your family."
(2) It also devalues the courage of real whistleblowers who have used proper channels to hold our government accountable.” McCain added: “It is a sad, yet perhaps fitting commentary on President Obama’s failed national security policies that he would commute the sentence of an individual that endangered the lives of American troops, diplomats, and intelligence sources by leaking hundreds of thousands of sensitive government documents to WikiLeaks, a virulently anti-American organisation that was a tool of Russia’s recent interference in our elections.” WikiLeaks last year published emails hacked from the accounts of the Democratic National Committee and John Podesta, chairman of Hillary Clinton’s election campaign.
(3) He made me laugh and cry, and his courage in writing about what he was going through was sometimes quite overwhelming.
(4) Gin was popularised in the UK via British troops who were given the spirit as “Dutch courage” during the 30 years’ war.
(5) This was a courageous move in a society where women were confined to purdah.
(6) The woman said it took her until the mid-1990s to pluck up the courage to report the abuse to Jersey's children's services department – and that her allegations were not taken seriously enough.
(7) My hope is that those who are at the Games take these words and let them echo, with grace, courage and dignity, in whatever way they choose to, because it will make a difference to those participating, and to those watching.
(8) After Japanese troops invaded the Chinese city of Nanking (now Nanjing) in 1937, slaughtering tens of thousands of civilians, Hirohito said he was "deeply satisfied" by the troops' courage in quickly seizing the city.
(9) And with that courage, we can stand together for good jobs and just wages.
(10) Honest journalism and the courageous whistleblowers who denounce human rights violations or attempts against state sovereignty deserve to be protected.
(11) These inspiring and courageous women are up against a highly resourced state that looks after its own.
(12) Congratulating Mr Rabin and Mr Arafat on having the courage to change, a Clintonite speciality, he went on: 'Above all, let us dedicate ourselves to your region's next generation.
(13) Alicia deserves praise for courageously standing up to Trump’s attacks.
(14) In the Russian gallery, for example, the courageous Vadim Zakharov presents a pointed version of the Danaë myth in which an insouciant dictator (of whom it is hard not to think: Putin) sits on a high beam on a saddle, shelling nuts all day while gold coins rain down from a vast shower-head only to be hoisted in buckets by faceless thuggish men in suits.
(15) They’re losing fear and they’re gaining courage, especially from the military positions he’s taken.
(16) They had announced Thursday that "as a result of our public appeal for help, a courageous and compassionate individual came forward to provide the assistance needed to properly bury the deceased."
(17) Essential traits of this personality are an independent mind capable of liberating itself from dogmatic tenets universally accepted by the scientific community; the capacity and courage to look at things from a new angle; powers of combination, intuition and imagination; feu sacré and perseverance--in short, intellectual as well as moral qualities.
(18) Cubism as practised by Picasso and Braque they thought courageous, up to a point, but misguided.
(19) The doubts over what some see as Miliband's lack of presentational skills and "wonkiness" have, in part, been stilled by his flashes of courage and intuitive accord with the public mood – on Libor, on predatory capitalism, on Murdoch.
(20) It cannot be right that anyone who has found the courage to escape their abusive or violent partner should be subjected to the stress and torment of being confronted and interrogated by them in any court.” Research by charity Women’s Aid suggests a quarter of women in family court proceedings have been cross-examined by an abusive former partner.