To come to blows means for 2 people to get into fights.
If two people or groups come to blows, they start fighting.
Come to blows means to start fighting after a disagreement.
If two people come to blows, they disagree so much about something that they start to fight.
Two smartly-dressed women came to blows on a crowded commuter train yesterday, amazing onlookers.
Local residents nearly came to blows over the proposal.
The heavyweights came to blows in a brawl that drew widespread condemnation in February, yet neither holds a license.
Two Doggett Coat and Badge-winners, both watermen resident in Greenwich, came to blows over which should row the Royal Barge.
Two spiders come to blows on a plant stem in our back garden.
Two surfcasters had come to blows out at the Point that morning.