Question: What form of play does Nine Men's Morris and Twilight Struggle have in common?

Context articles: Nine Men's Morris
The record of the nine
Twilight Struggle
Friendship Nine
Twelve Men
Kensington (game)
Mark Landler
The Long, Twilight Struggle
Morabaraba
Nine Men

Nine Men's Morris is a strategy board game for two players dating at least to the Roman Empire.
 The game is also known as Nine Man Morris, Mill, Mills, The Mill Game, Merels, Merrills, Merelles, Marelles, Morelles and Ninepenny Marl in English.
 The game has also been called Cowboy Checkers and is sometimes printed on the back of checkerboards. Nine Men's Morris is a solved game in which either player can force the game into a draw.
The record of the nine was a term used in hurling to refer to the nine men who held the record between 1944 and 2009 for winning four consecutive All-Ireland Senior Hurling Championship winners' medals.
 This occurred between 1941 and 1944 when Cork won the championship title every year.
 Only nine men played in all four finals, hence the record of the nine.
 These men were Din Joe Buckley, Alan Lotty, Jack Lynch, Willie Murphy, Paddy O'Donovan, Johnny Quirke, Christy Ring, Batt Thornhill and Dr. Jim Young.
Twilight Struggle: The Cold War, 1945–1989 is a card-driven strategy game for two players, with its theme taken from the Cold War.
 One player plays the United States (US), and the other plays the Soviet Union (USSR).
 The game takes its title from John F. Kennedy's inaugural address:
The Friendship Nine, or Rock Hill Nine, was a group of African-American men who went to jail after staging a sit-in at a segregated McCrory's lunch counter in Rock Hill, South Carolina in 1961.
 The group gained nationwide attention because they followed the 1960 Nashville sit-in strategy of "Jail, No Bail", which lessened the huge financial burden civil rights groups were facing as the sit-in movement spread across the South.
 They became known as the Friendship Nine because eight of the nine men were students at Rock Hill's Friendship Junior College.
The Council of Twelve Men was a group of 12 men, chosen on 29 August 1641 by the residents of New Netherland to advise the Director of New Netherland, Willem Kieft, on relations with the Native Americans due to the murder of Claes Swits.
 Although the council was not permanent, it was the first representational form of democracy in the Dutch colony.
 The next two councils created were known as the Eight Men and the Nine Men
Kensington is an abstract strategy board game devised by Brian Taylor and Peter Forbes in 1979, named after London's Kensington Gardens, which contains the mosaic upon which the gameboard is patterned.
 It is played on a geometrical board based on the rhombitrihexagonal tiling pattern.
 The objective of the game is to capture a hexagon by occupying the six surrounding vertices.
 The game maintains an elegant simplicity while still allowing for astonishingly complex strategy.
 The placing and movement of tokens have been compared to Nine Men's Morris.
Mark Aurel Landler (born October 26, 1965 in Stuttgart, Germany) is an American journalist who has been a White House Correspondent for "The New York Times", based in Washington, D.C., since March 2011.
 He is the author of "Alter Egos: Hillary Clinton, Barack Obama and the Twilight Struggle Over American Power" (Random House, 2016).
"The Long, Twilight Struggle" is an episode from the second season of the science fiction television series "Babylon 5".
Morabaraba is a traditional two-player strategy board game played in South Africa, Botswana and Lesotho.
 The game is also known as Mlabalaba, Mmela (in Setswana), Muravava, Umlabalaba.
 The game is similar to Twelve Men's Morris, a variation on the Roman board game Nine Men's Morris.
The council of Nine Men was a citizens board and a form of representational democracy in New Netherland.
 It replaced the previous councils, the Twelve Men and the Eight Men.
 Members of the council were elected in 1647, 1649, 1650 and 1652.
 On July 26, 1649, eleven current and former members of the board signed the "Petition of the Commonality of New Netherland", which requested that the States General take action to encourage economic freedom and force local government like that in the Netherlands, removing the colony from the control of the Dutch West India Company.
 It became the basis for the municipal government when the city of New Amsterdam received its charter in 1653.