A top U.S military officer called on NATO Wednesday to be prepared to move fast to deploy additional forces if U.S President Trump and other heads of states agree to bolster the alliance's mission in Afghanistan.

"What I asked my counterparts to do today is be prepared to act quickly," Marine Gen. Joseph Dunford, chairman of the Joint Chiefs of Staff, said Wednesday after a meeting with NATO's military leaders. 

"If the political decision is to do more, let's do more as fast as we can."

Meanwhile, NATO Supreme Allied Commander Europe Curtis Michael Scaparrotti said at the Military Committee of the organization in Brussels that the decision to send the troops to Afghanistan should be finalized soon.

“I would tell you from a military perspective the sooner we can provide him his (Gen. John Nicholson) shortages, the better. Here in NATO we think this will be considered here very soon. This is the normal period. He's got it in. We're about to have a Heads of State meeting. I think it will be considered before too long,” he said.

He stated that the surge in number of troops in Afghanistan will not mean a change in the Afghan mission - which is limited to train, assist and advising the Afghan forces.

“It's going to take time to build a military in Afghanistan who now has the fight but then has the capacity to sustain that and bring the stability that's needed to bring the Taliban to negotiation. I have confidence we can do that,” he added.

Meanwhile, NATO officials said all the options will be considered for breaking the Afghanistan deadlock.

“The Afghan security forces are faced with a challenging security environment. They continue to be tested, but they also continue to endure. It is unquestionable that a stable Afghanistan is in everybody's interest, and not just for regional stability,” said Gen. Peter Paul, head of NATO’s Military Committee.

NATO’s heads of state summit will be held in Brussels on May 25 where they will announce their decision to send in more troops to Afghanistan.