Napoleon Yaovi Richard Ashley-Lassen (born 29 March 1934) was a Chief of the Defence Staff of the Ghana Armed Forces.

At one stage, he served as a pilot ferrying Ghanaian troops to and from the Democratic Republic of Congo during the United Nations peace keeping exercise there.

[2] He was appointed Chief of Air Staff in 1968 when the National Liberation Council military government was in power.

[3] Following the overthrow of the Busia government on 13 January 1972, he was appointed as the Chief of the Defence Staff, a position he held until December 1974.

[4] Following the 13 January 1972 coup d'état led by then Colonel Acheampong, he was appointed a member of the ruling National Redemption Council military government.