At first, every army needs a commander and he is stoic Sir Archibal Armitage-Shanks, with his second in command.
Then two sections of brave Sikh infantry armed in -42 manner, but will pass also earlier periods just by leaving out SMG's and replacing with sergeants with rifles.
I like to build my squads, or sections pretty identical, just for the ease of game. So there's only minor changes in equipment, mainly number of SMG's.
Radio operator to keep in touch with HQ and artillery support.
And then first vehicle Indian pattern armored car naturally. This is not the last vehicle to be but more of those in next post.