Some members of a Montana National Guard unit in Afghanistan are angry over not getting anticipated rest and recuperation.

Officials say Army policy mandates soldiers only get leave after spending 270 days in the field. The unit might not get any leave, since their replacements will likely show up before the 270-day mark.

Some family members are upset about it, but Major Tim Crowe says not everyone knows the guidelines.

"Communication errors can happen. It's unfortunate that we're dealing with this now, but the effort is definitely under way to make sure that the family members understand what the policy is why the policy is, and what the expectations of the soldiers are," said Crowe.

Senators Tester and Baucus have written to Defense Secretary Leon Panetta about the issue. They want leave based on projected days of in-country service, not actual time on the ground.