Why was this case tried in military court?

Tankloads of ink have been spilled on efforts to liberate Guantanamo detainees and to challenge the U.S. military commissions. In a twist, Cuba has used a military court to convict nine Cubans for attempting to enter the U.S. leasehold enclave.  Eight of them are on a hunger strike. Details here.

Human rights norms strongly disfavor the trial of civilians by military courts.