The question asks which factor was not a contributing cause of the War of 1812. Based on the search results: Contributing causes of the War of 1812 included:
- British impressment of American sailors
- British restrictions on American trade during the Napoleonic Wars (Orders in Council)
- British support for Native American resistance against American expansion in the Northwest Territory
- American desires related to national honor and expansionist fears
- Seizure of American merchant ships by the British Navy
One factor that was not a cause:
- The French taking over Florida was not a cause of the War of 1812. The British urging Native Americans to go to war, American merchant ships being seized, and British impressment were causes, but the French takeover of Florida was not involved in starting the war.
Thus, the correct answer to "all of the following were contributing causes of the War of 1812 except" is that the French taking over Florida was not a cause.
