"It's just proof that the ban shouldn't have been imposed. We're a US ally in the anti-terrorist coalition, and I think it was a short-term measure and it's good that this new measure has been introduced," Mesic said.
On Monday, US President George W. Bush signed a decision lifting a ban on providing US military assistance to 21 countries, including Croatia, through the International Military Education and Training (IMET) programme.
The ban was imposed in 2003 in an effort to shield US citizens from the jurisdiction of the International Criminal Court (ICC).
Croatian military personnel will now again be able to go to US military academies for training and Croatia will be eligible for aid under the IMET programme.
Asked if this meant that the case was now closed, Mesic replied: "I don't know if it's closed, but as far as we're concerned, we have our own views."
Croatian Radio noted that the ban was lifted following recent visits to the US by both Mesic and Prime Minister Ivo Sanader, and announcements that Croatia might send an additional 150 troops to Afghanistan as part of the US-led peace mission there.
"As far as Afghanistan is concerned, the troops we send serve in the observer mission there. Imposing peace is another kind of mission. If that comes about, we have to have both preparations and equipment. Only when that happens can we talk," the Croatian president said.