Military vehicle, in particular tank, comprising: a number of cameras for recording images, arranged on an outer skin of the vehicle, an HMI device for an operator, which is arranged in an inner space of the vehicle and can be coupled to the cameras, the HMI device comprising: a screen having a plurality of display areas (21, 22) at least comprising a first display area for displaying a viewing area provided by means of at least some of the cameras and a second display area for displaying a currently selected menu, a plurality of physical operating keys (31-35; 41-43; 51-55; 61-68; 71-74), wherein each operating key (31-35; 41-43; 51-55; 61-68; 71-74) comprises an icon for visually indicating the function assigned to the operating key (31-35; 41-43; 51-55; 61-68; 71-74), and wherein the operating keys (31-35; 41-43; 51-55; 61-68; 71-74) are arranged in a frame around the display areas (21, 22), grouped in a plurality of different function groups according to their assigned functions, a backlight (91, 92, 93) for the operating keys (31-35; 41-43; 51-55; 61-68; 71-74), and a control unit, characterised in that each operating key (31-35; 41-43; 51-55; 61-68; 71-74) is suitable for assuming one of three different statuses comprising a first status "available", a second status "unavailable" and a third status "selected"; and the control unit is configured to control the backlight (91, 92, 93) in such a way that the operating keys (31-35; 41-43; 51-55; 61-68; 71-74) are illuminated differently depending on their respective status in such a way that those operating keys in the first status light up in a first color, those operating keys in the second status light up in a second color and those operating keys in the third status light up in a third configurable selection color, in particular blue. a number of cameras for recording images, arranged on an outer skin of the vehicle, an HMI device for an operator, which is arranged in an inner space of the vehicle and can be coupled to the cameras, the HMI device comprising: a screen having a plurality of display areas (21, 22) at least comprising a first display area for displaying a viewing area provided by means of at least some of the cameras and a second display area for displaying a currently selected menu, a plurality of physical operating keys (31-35; 41-43; 51-55; 61-68; 71-74), wherein each operating key (31-35; 41-43; 51-55; 61-68; 71-74) comprises an icon for visually indicating the function assigned to the operating key (31-35; 41-43; 51-55; 61-68; 71-74), and wherein the operating keys (31-35; 41-43; 51-55; 61-68; 71-74) are arranged in a frame around the display areas (21, 22), grouped in a plurality of different function groups according to their assigned functions, a backlight (91, 92, 93) for the operating keys (31-35; 41-43; 51-55; 61-68; 71-74), and a control unit, characterised in that each operating key (31-35; 41-43; 51-55; 61-68; 71-74) is suitable for assuming one of three different statuses comprising a first status "available", a second status "unavailable" and a third status "selected"; and the control unit is configured to control the backlight (91, 92, 93) in such a way that the operating keys (31-35; 41-43; 51-55; 61-68; 71-74) are illuminated differently depending on their respective status in such a way that those operating keys in the first status light up in a first color, those operating keys in the second status light up in a second color and those operating keys in the third status light up in a third configurable selection color, in particular blue. a screen having a plurality of display areas (21, 22) at least comprising a first display area for displaying a viewing area provided by means of at least some of the cameras and a second display area for displaying a currently selected menu, a plurality of physical operating keys (31-35; 41-43; 51-55; 61-68; 71-74), wherein each operating key (31-35; 41-43; 51-55; 61-68; 71-74) comprises an icon for visually indicating the function assigned to the operating key (31-35; 41-43; 51-55; 61-68; 71-74), and wherein the operating keys (31-35; 41-43; 51-55; 61-68; 71-74) are arranged in a frame around the display areas (21, 22), grouped in a plurality of different function groups according to their assigned functions, a backlight (91, 92, 93) for the operating keys (31-35; 41-43; 51-55; 61-68; 71-74), and a control unit, characterised in that each operating key (31-35; 41-43; 51-55; 61-68; 71-74) is suitable for assuming one of three different statuses comprising a first status "available", a second status "unavailable" and a third status "selected"; and the control unit is configured to control the backlight (91, 92, 93) in such a way that the operating keys (31-35; 41-43; 51-55; 61-68; 71-74) are illuminated differently depending on their respective status in such a way that those operating keys in the first status light up in a first color, those operating keys in the second status light up in a second color and those operating keys in the third status light up in a third configurable selection color, in particular blue.