| 159th Infantry Regiment | |
|---|---|
&sq=Envato&lang=en&file=File:159th_Infantry_Regiment_Coat_of_Arms.png) Coat of arms | |
| Active | 1917–2000 |
| Country |  United States |
| Allegiance | California |
| Branch | California Army National Guard |
| Type | Infantry |
| Role | Light Infantry |
| Size | Regiment |
| Nickname(s) | Fifth California[1] |
| Motto(s) | Unity for Service[1] |
| Engagements | World War I World War II |
| Insignia | |
| Distinctive unit insignia | &sq=Envato&lang=en&file=File:159_Inf_Rgt_DUI.gif) |
| U.S. Infantry Regiments | ||||
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The 159th Infantry Regiment was an infantry regiment of the United States Army. It served as a part of the 40th Infantry Division for most of its history before deploying in World War II as a part of the 7th Infantry Division.