Along these lines, I’ve always thought the game could benefit from a ‘Conscript’ rule. Conscripts are units that cost 2 IPCs each and can be placed on any territory a power controls, in numbers up to the value of that territory. This would represent the ability of nations to draft large masses of poorly-trained soldiers whose main function was to serve as rearguards and cannon fodder.
Cost: 2
Attack: 0 (increases to 1 if paired with Artillery)
Defence: 1
Move: 0 (increases to 1 if paired with non-Conscript land unit)
So, for example, the UK could pay 4 IPCs to drop 2 Conscripts in Egypt at the end of the turn, to help hold the territory.
Conscripts are just buffer units whose main ability is to take a hit for a more expensive unit; the only real advantage in buying them is their flexibility in placement. (If you have older editions of A&A you can use different colours of Infantry to represent Conscripts: brown for the USSR, grey for Germany, mint green for UK, yellow for Japan.)