Press Ctrl+Alt+Shift+C to enter a cheat code. Here is a list of supported codes (#N means an integer number).

Effect	Code
Adds #N to air transports num (can be negative)	air #N
Adds #N to aux slots (can be negative)	aux #N
Adds #N to core slots (can be negative)	core #N
Adds #N to prestige (can be negative)	prestige #N
Adds #N to rail transports num (can be negative)	rail #N
Adds #N to scenario turn count. Can be negative.	turns #N
Adds #N to sea transports num (can be negative)	sea #N
All killed units move to reserve with zero strength and can be reformed before the next scen	reform units
All units move at speed 50. Entering the code again disables this mode.	turbo units
Allows to buy any future equipment. Entering the code again disables this mode.	all eqp
Any attack by our units forces the enemy to retreat. Entering the code again disables this mode.	force retreat
Disables ZOC for our units. Entering the code again disables this mode.	no zoc
Disband selected unit (confirmation popup).	D (no ctrl alt shift c first; undocumented hotkey)
Ends current scenario with outcome #N (in campaigns 0=decisive victory, 1=marginal victory, 2=loss).	endscn #N
Every attack of our units completely kills the opponent. Entering the code again disables this mode. Bye bye save/reload.	uber units
Makes all combats play exactly as they were predicted (unless rugged defense happens)	chess
Sets ammo of the selected unit to #N	ammo #N
Sets current weather (0=clear, 1=overcase, 2=raining, 3=snowing)	weather #N
Sets entrenchment of the selected unit to #N	ent #N
Sets experience of the selected unit to #N	exp #N
Sets fuel of the selected unit to #N	fuel #N
Sets ground state (0=dry, 1=muddy, 2=frozen)	ground #N
Sets strength of the selected unit to #N	str #N
Shows enemy's units on the map (the opponent will not see our units until he enteres this code on his turn). Entering the code again disables this mod	fog of war