Al Raqqa in Syria is not exactly Berlin circa 1945. That was when the Soviet (Russian) armies were about to enter Berlin, while Dwight Eisenhower’s forces were speeding to join them. It was almost like a race, which the Russians won.
Al Raqqa is the chosen temporary capital of ISIS (DAESH), pending the capture of Damascus or Baghdad. But Al Raqqa faces a similar situation that Berlin faced in early 1945. At least two armies are racing towards it. The most substantial one is the alliance that supports the Syrian regime (Syrian Army, Russia, Iran, Hezbollah, etc). Then there is an alliance that is armed and supported by the United States, dominated by Syrian Kurds in the north.
Then there are the Iraqi military and their Iranian and local militia allies moving steadily if slowly towards Mosul. If Mosul falls, the Iraqis could find themselves tempted to join the race towards Al Raqqa as well.
The Saudis and their putative Turkish allies have been reduced to repeated futile threats by Adel al Jubeir, the Saudi Foreign Minister, that Al Assad must go. Al Jubeir adds: by peaceful or by military means. He must be waiting for Hillary Clinton to save his bosses nuts from the Syria fire.
This is how it stands now. Mosul and Al Raqqa might well fall this year. At the latest they will fall no later than 2017.
My Fatwa (humble but almost certainly accurate) on the violent gruesome brief reign of the Wahhabis of the Islamic State of Iraq and Syria ( or the Levant).
M Haider Ghuloum