it is clear that the burdens of the war had to be particularly intolerable for the most backward countries. russia was the first to be compelled to leave the field.

How would the previous sentence be correctly capitalized?
Answer: It is clear that the burdens of the war had to be particularly intolerable for the most backward countries. Russia was the first to be compelled to leave the field.
we have tried it only once, but it left a good impression.

How would the previous sentence be correctly capitalized?
Answer: We have tried it only once, but it left a good impression.
mediaportal is a free open source media center that ships with everything you'd expect it to.

How would the previous sentence be correctly capitalized?
Answer: MediaPortal is a free open source media center that ships with everything you'd expect it to.
the balenciaga the first baby handbag is crafted of soft leather and is decorated with stylish antique looking chrome toned accents.

How would the previous sentence be correctly capitalized?
Answer: The Balenciaga The First Baby Handbag is crafted of soft leather and is decorated with stylish antique looking chrome toned accents.