# Notebooks propose tanks, scythed chariots, and other war-machines for court patrons

Date: 1484

## The fact

In the Milan years Leonardo's notebooks propose tanks, scythed chariots, and related war-machines for court patrons. Most were not built. The offering is the instrument. Leonardo da Vinci's documented role is: He drew offensive machines for patrons. Most were not built; the offering is still a military-design path.

## Context

Sforza wanted engineers of war. Sharing the brief with that court is required. Borgia service is a later, separate office. The setting of Notebooks propose tanks, scythed chariots, and other war-machines for court patrons is the public file around 1484-01-01. Shared offices, unnamed crews, printers, or later editors may appear without becoming this instrument. Contribution type is direct. Driver [humanitarian-access](/drivers/humanitarian-access) is attached because the significance names a mechanism from this act, not because a standing list needed coverage.

Shared responsibility is part of Notebooks propose tanks, scythed chariots, and other war-machines for court patrons. Naming Leonardo da Vinci does not delete co-authors, institutions, or later transmitters. The lag from 1484-01-01 to any measured indicator is not treated as zero. Alternative explanations — weather, other armies, later statutes, or independent cultural change — remain live where the sources do not close them.

## Evidence and sources

Official locator: Biblioteca Nazionale Centrale di Firenze — Leonardo notebooks neighbourhood at https://www.bncf.firenze.sbn.it/ (BNCF). Independent locator: Britannica — Leonardo, military engineering drawings at https://www.britannica.com/biography/Leonardo-da-Vinci (Encyclopaedia Britannica). Official carrier: Biblioteca Nazionale Centrale di Firenze — Leonardo notebooks neighbourhood (https://www.bncf.firenze.sbn.it/; BNCF). Independent carrier: Britannica — Leonardo, military engineering drawings (https://www.britannica.com/biography/Leonardo-da-Vinci; Encyclopaedia Britannica).

Official or archival record: Biblioteca Nazionale Centrale di Firenze — Leonardo notebooks neighbourhood (https://www.bncf.firenze.sbn.it/; BNCF).

## Significance

Worsening path from Notebooks propose tanks, scythed chariots, and other war-machines for court patrons on 1484-01-01. Offering war-machine designs is a humanitarian-harm path of medium confidence because few were built. The welfare reading on this path is worsening.

## What is established and what is not

Established: a sourced public record of Notebooks propose tanks, scythed chariots, and other war-machines for court patrons under 1484-01-01 for Leonardo da Vinci. Established: a sourced public record of Notebooks propose tanks, scythed chariots, and other war-machines for court patrons under 1484-01-01.

Later competitions, monuments, translations, UNESCO listings, museums, and adaptations are not converted into extra lifetime acts.

If a number is not in the two records named above, it is not supplied here.

Confidence is stated on the impact path, not hidden in adjectives. Do not treat drawings as deployed tanks. Do not treat them as toys. Mixed effects of Notebooks propose tanks, scythed chariots, and other war-machines for court patrons are separate paths.

The contribution type is direct. The attached driver is humanitarian-access. The welfare reading used in this dossier is worsening. That reading is an impact-path choice, not a property stored on the Fact itself.

## People

- Leonardo da Vinci: https://factrail.ai/people/leonardo-da-vinci

## Drivers

- Humanitarian Access: https://factrail.ai/drivers/humanitarian-access

## Sources

- https://www.bncf.firenze.sbn.it/
- https://www.britannica.com/biography/Leonardo-da-Vinci

## Methodology

https://factrail.ai/methodology

Canonical: https://factrail.ai/facts/ldv-war-machines