I got quite good at one of the older versions, but this new one has halved my max wave count.
My old tactic was to rush some of the nicer medals (free Officer at start, free Garands, extra Rifle Skill) with my first few games, then when I was happy with my medals, when I started I'd push forward until I had decent TPs and a clear-ish battlefield. The best shot on the squad gets a BAR (If he's 30+ skill he's going to be a murdering bastard with that thing), the second best will eventually get ranger training, but that's not as important. 1st soldier ordered (bringing me to 6 with the free officer) is an engineer, and he throws up a trench in one of the bottom corners, then chucks up a camo net over it. The man with the BAR should be tearing apart everything on the battlefield, and if you have anyone else with semi-decent rifle skill they'll be doing fairly well too. Next up is a bazooka man (Bazookas have a short 'safe' range; they don't explode just after being fired. This means they can be stationed right behind the trench, still under the net, and have both human shields and clear shots.). He, along with the officer and medic (Guaranteed to need one) stand behind the trench, which is filled by the 4 soldiers. Repeat the process in the other corner, but have a Signaller, and maybe not another Officer. Sarge is a handy guy here, he does almost the same stuff, he raises morale, and he's a brilliant shot. By now you have 8+ guys with rifles/MGs (Including Sarge and the Signaller), 2 Bazookas, 1-2 medics, an Officer and an Engie. The engie throws up a Bunker a bit forward from the trenches, which gets a Frenchie in each corner(With a medic to patch them up; these are distractions from the Machine Gunner in the center, and so get a lot of fire.) and a MG guy in the center. The MG guy's a good candidate for Ranger Training; high Rifle on those guys makes them brilliant. Behind the bunker goes a Pillbox and an antenna, if you can fit them. Last up is a few more Camo Nets, and maybe some Barbed Wire if you want. Snipers are also decent additions (I put them in the end of the trench not covered by the Camo), but I rarely use Vehicles. Against vehicles/other big explosion causing bastards, focus fire (Officer's Order, immediately causes the Bazookas to launch at the target) on them, and pray your bazooka isn't blind and the rocket doesn't just pass through without impacting.
The officer should collect most of the supply drops, as a good officer is very useful.