Definition of "infighting"

[…] the economic and financial mismanagement of Mahmoud Ahmadinejad’s government and chronic infighting within the regime have contributed to the economic chaos […]

2012, The Economist, 06 Oct 2012 issue, Iran’s nuclear programme: A red line and a reeling rial

Tate predicted that Wills, famed for infighting, would have to change his tactics against Firpo to avoid being knocked "very loose."

1924 September 1, “Abdication”, in Time

His left jab pecked at McTigue's face, and at infighting he matched the champion on even terms.

1955 March 28, Charles Lesemann, “Ruckus in Georgia”, in Sports Illustrated