Slitherine

Just got this game which Is a great strategy game, but I keep getting mission failed. Only upto frontal attack first few missions. But even though I capture ground, get flags and their tanks retreating and one base to go, says failed. Every time now. Obviously missing something, was playing strategically is there a limit on moves ? If so kinda blows my plans out hence why all missions but one failed even though I've almost captured the last base.

Check the briefing carefully and the objectives in the info panel and make sure you're achieving them all.