I like them.
Some tweaks:
1. On the LSSC, none of your M60s have any ammo in them, yet the one guy looks like he is ready to start shooting! Get some ammo belts in them.
2. In the one with the watchtower, I don't see that .50 MG ever working the way it is, just anchored into the wood. The recoil from the .50 would tear that thing up. Also, the tower is basically in the midst of a bunch of equally tall trees, rendering its purpose questionable (how can you see if you are in the trees? Plus, someone could sneak right up on it).
3. On the LSSC, I would not just have an M79 sitting on the edge where it can fall overboard very easily.
4. The rucksack attached to near the rear right side of the American M113 looks like it is glued to the side of a tank by "magic". Add some straps attached to some of the grab handles on top.
Your painting, water work, and most of the foliage looks very good. You should be proud of the type and amount of work you have done here.