Answer:
Tewodros had become increasingly unpopular over the years due to his harsh methods, and many regional figures had rebelled against him. Several readily assisted the British by providing guides and food as the expeditionary force marched towards Magdala, where the Emperor had fortified the mountaintop.
1: Subordinate
2: Subordinate
3: Main
4: Subordinate
5: Main
6: Subordinate
7: Main (I believe)
8: Main
9: Subordinate
10: Subordinate
The subordinate clauses cannot stand on their own: they leave a hanging question. The majority of them also start with a coordinating conjunction, and that's a common thing in subordinate clauses. The main clauses can stand by themselves, as it can be seen as a whole sentence.
