Those who think it's a science fiction or propaganda - sorry, pals, it's a true story. From the Bulgarian side it was officially stated and the story was told from it's own heroes. The attacks happened mostly night as poles and Bulgarians didn't have much equipment for night vision and Mahdi's attackers knew that. The soldiers were shooting in direction of the reflection of metal. The mortars fire was apparently mostly dangerous and because it came from small 65mm mortars that can easily be loaded on cars. The person who neutralize the mortar fire - Sergeant Ivan Mihaylov took initiative and with another 4 comrades run for about 2.5km in the night getting into the back of the attackers and surprised them. The actual number of attackers was not known, although they guess that Mahdi's supporters that came in Kerbala was at least 360 and more locals joined them. The Polish and Bulgarian units were sent to help the city hall as the Iraqi soldiers there suffered an attack. Poles and Bulgarians managed to get to the hall through 2 ambushes and once in the hall, the severe attacks began. Back to the movie - it's definitely a very nice war movie, but it's not a surprise - every third good producer and director in Hollywood is Polish. They tried to keep to the original story as much as they could and gave a good glance of the whole story. Worth seeing and definitely it will come ahead of many war movies I've seen.
