Commercial military paintings

1. Does "commercial military paintings" mean "paintings that advertise the military"?

2. Does the underlined section mean "includes, aside from compositions that respond to battle, commercial military paintings, anti-war art, cartoons, and posters"?

3. Does "This approach reflects the current worldwide immersion in wars everywhere expressed in" mean "This approach reflects the current immersion in wars everywhere in the world, that is expressed in ..."?

Context:

The Internet’s wider view includes commercial military paintings, anti-war art, cartoons, and posters alongside compositions that respond to battle. This approach reflects the current worldwide immersion in wars everywhere expressed in the recent work of British artists Jake and Dinos Chapman.