Short answers, pulled from the story.
January Suchodolski (the 19th of September 1797 - the 20th of March 1875) was a Polish painter and Army officer, known for military battle paintings depicting the Kościuszko Uprising, the Napoleonic wars, and campaigns of the Russian Army. He was a member of the Imperial Academy of Arts and a pupil of the French battle painter Horace Vernet.
In 1812, Suchodolski stood guard at the Hotel Angielski in Warsaw while Napoleon Bonaparte stayed there incognito during his retreat from Moscow. Suchodolski was fifteen at the time, having joined the Warsaw Cadet Corps in 1810.
Yes, Suchodolski and his brother Rajnold both participated in the November Uprising of 1830. January fought at the First Battle of Wawer, the Battle of Olszynka Grochowska, and the Battle of Iganie. His brother Rajnold died during the uprising.
Suchodolski studied under Horace Vernet in Rome from 1832 to 1837, and had earlier encountered Vernet's military paintings through the palace art galleries he accessed via his patron Wincenty Krasiński. He also knew the painter Antoni Brodowski and socialized with artists including Thorwaldsen, Johann Friedrich Overbeck, Peter von Cornelius, and Louis Léopold Robert.
Nicholas I invited Suchodolski to St. Petersburg after his painting "Siege of Akhaltsikhe" earned him membership in the Imperial Academy of Fine Arts. The tsar commissioned him to paint famous battles of the Russian Army.
In 1860, Suchodolski joined the committee of the Society for the Encouragement of Fine Arts and helped set up the Museum of Fine Arts in Warsaw.