Probably a network issue on the wargamning.net side.
Not only am I suffering from bad laggings and screen hangs (nothing odd on the on screen stats) but when I ask multiple people on both teams also say they're suffering the same problem. This has been in my last 3 battles, so over about a 40 minute period. I suspect networking rather than server issues, but with multiple players in the same battle suffering the same problem I some how doubt it's my own connection (when it first happened I was planning to reboot my router until two others (one on each side) announced the same problem in the same battle.