1st Division (Portugal)
| 1ª Divisão do CEP 1st CEP Division | |
|---|---|
| Active | 1917–1919 |
| Country | Portugal |
| Allegiance | Portuguese Army |
| Branch | Army |
| Type | Division |
| Role | Infantry |
| Size | 25 000 |
| Headquarters | Lestren, France |
| Engagements | World War I |
| Commanders | |
| Division commander | General Gomes da Costa |
The 1st Division was one of the two divisions of the Portuguese Expeditionary Corps (CEP, Corpo Expedicionário Português), the main military force of Portugal that fought in the World War I Western Front on the side of the Allies. The Division was under the command of General Gomes da Costa, during most of its existence.